As Serena sat in the same chair that she occupied shortly before her trip to Wimbledon, the 2012 U.S. Open champion gave Jimmy Fallon credit on Monday night for the good luck that has followed her from England's grassy courts to the top of the tennis world.

Since her last visit to the show, Williams added two gold medals -- one for doubles with her sister Venus -- and two additional grand slam championships to her already-decorated resume in just three short months. So what did Williams do to celebrate her accomplishments?

She partied like it's 1999.

After admitting that she celebrated "really hard" following her Wimbledon championship, Williams told Fallon that she reveled in her U.S. Open victory with a little karaoke.

"I'm really in this 90's moment right now," she said. "I love anything by Air Supply."

After deeming her the "greatest tennis player in America," Fallon busted into a duet with Williams before closing out the interview with a little Gloria Gaynor.

With pipes like these, we can only wonder if Victoria Azarenka is capable of holding a tune herself.

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  • Serena Williams

    Serena Williams reacts after beating Victoria Azarenka, of Belarus, in the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. Two points from defeat, Williams suddenly regained her composure to come back and win the last four games, beating No. 1-ranked Azarenka 6-2, 2-6, 7-5 on Sunday for her fourth U.S. Open title and 15th Grand Slam title overall. (AP Photo/Darron Cummings)

  • Serena Williams

    Serena Williams reacts after beating Victoria Azarenka, of Belarus, in the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Julio Cortez)

  • Serena Williams

    Serena Williams reacts after beating Victoria Azarenka, of Belarus, in the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Mike Groll)

  • Serena Williams

    Serena Williams holds the championship trophy after beating Victoria Azarenka, of Belarus, in the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. Two points from defeat, Williams suddenly regained her composure to come back and win the last four games, beating No. 1-ranked Azarenka 6-2, 2-6, 7-5 on Sunday for her fourth U.S. Open title and 15th Grand Slam title overall. (AP Photo/Julio Cortez)

  • Serena Williams

    Serena Williams reacts after beating Victoria Azarenka, of Belarus, in the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Mike Groll)

  • Serena Williams

    Serena Williams reacts after beating Victoria Azarenka, of Belarus, in the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Mike Groll)

  • Serena Williams

    Serena Williams reacts while playing Victoria Azarenka, of Belarus, during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Mike Groll)

  • Serena Williams

    Serena Williams returns a shot to Victoria Azarenka, of Belarus, during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Mike Groll)

  • Victoria Azarenka

    Victoria Azarenka, of Belarus, returns a shot to Serena Williams during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Julio Cortez)

  • Serena Williams

    Serena Williams reacts while playing against Victoria Azarenka, of Belarus, during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Darron Cummings)

  • Victoria Azarenka

    Victoria Azarenka, of Belarus, reacts while playing against Serena Williams during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Julio Cortez)

  • Victoria Azarenka

    Victoria Azarenka, of Belarus, returns a shot to Serena Williams during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Julio Cortez)

  • Serena Williams

    Serena Williams reacts while playing against Victoria Azarenka, of Belarus, during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Charles Krupa)

  • Victoria Azarenka

    Victoria Azarenka, of Belarus, reacts while playing Serena Williams during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Mike Groll)

  • Serena Williams

    Serena Williams reacts while playing Victoria Azarenka, of Belarus, during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Mike Groll)

  • Tennis fans watch Serena Williams play Victoria Azarenka, of Belarus, during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Julio Cortez)

  • Victoria Azarenka

    Victoria Azarenka, of Belarus, returns a shot to Serena Williams during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Kathy Willens)

  • Serena Williams

    Serena Williams reacts while playing against Victoria Azarenka, of Belarus, during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Charles Krupa)

  • Serena Williams

    Serena Williams returns a shot to Victoria Azarenka, of Belarus, during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Charles Krupa)

  • Victoria Azarenka

    Victoria Azarenka, of Belarus, reacts while playing Serena Williams during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Mike Groll)

  • Victoria Azarenka

    Victoria Azarenka, of Belarus, reacts while playing against Serena Williams during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Charles Krupa)

  • Serena Williams

    Serena Williams reacts while playing against Victoria Azarenka, of Belarus, during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Darron Cummings)

  • Victoria Azarenka

    Victoria Azarenka, of Belarus, returns a shot to Serena Williams during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Mike Groll)

  • Victoria Azarenka

    Victoria Azarenka, of Belarus, reacts while playing against Serena Williams during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Darron Cummings)

  • Victoria Azarenka

    Victoria Azarenka, of Belarus, reacts while playing against Serena Williams during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Darron Cummings)

  • Serena Williams

    Serena Williams walks on the court while playing Victoria Azarenka, of Belarus, during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Julio Cortez)

  • Serena Williams

    Serena Williams bounces a ball during the championship match against Victoria Azarenka, of Belarus, at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Charles Krupa)

  • Serena Williams

    Serena Williams prepares to serve to Victoria Azarenka, of Belarus, during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Charles Krupa)

  • Serena Williams

    Serena Williams reacts while playing against Victoria Azarenka, of Belarus, during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Charles Krupa)

  • Serena Williams

    Serena Williams gets up after returning a shot to Victoria Azarenka, of Belarus, during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Kathy Willens)

  • Serena Williams

    Serena Williams returns a shot to Victoria Azarenka, of Belarus, during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Kathy Willens)

  • Serena Williams

    Serena Williams returns a shot to Victoria Azarenka, of Belarus, during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Mike Groll)

  • Serena Williams

    Serena Williams returns a shot to Victoria Azarenka, of Belarus, during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Julio Cortez)

  • Victoria Azarenka

    Victoria Azarenka, of Belarus, returns a shot to Serena Williams during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Kathy Willens)

  • Victoria Azarenka

    Victoria Azarenka, of Belarus, reacts while playing against Serena Williams during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Kathy Willens)

  • Victoria Azarenka

    Victoria Azarenka, of Belarus, reacts while playing against Serena Williams during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Mike Groll)

  • Serena Williams

    Serena Williams returns a shot to Victoria Azarenka, of Belarus, during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Mike Groll)

  • Victoria Azarenka

    Victoria Azarenka, of Belarus, reacts while playing against Serena Williams during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Darron Cummings)

  • Victoria Azarenka

    Victoria Azarenka, of Belarus, reacts while playing against Serena Williams during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Darron Cummings)

  • Will Ferrell

    Comedian Will Ferrell reacts as Serena Williams plays Victoria Azarenka, of Belarus, during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Darron Cummings)

  • Serena Williams

    Serena Williams reacts while playing Victoria Azarenka, of Belarus, during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Mike Groll)

  • Serena Williams

    Serena Williams holds her racket while playing Victoria Azarenka, of Belarus, during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Charles Krupa)

  • Serena Williams

    Serena Williams holds her racket while playing Victoria Azarenka, of Belarus, during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Charles Krupa)

  • Victoria Azarenka

    Victoria Azarenka, of Belarus, reacts while playing Serena Williams during the championship match at the 2012 US Open tennis tournament, Sunday, Sept. 9, 2012, in New York. (AP Photo/Mike Groll)