Kelly Clarkson has been engaged for less than a week, but she already has a wedding singer lined up -- fiance Brandon Blackstock's stepmom, Reba McEntire!

McEntire offered up her singing services while she and Clarkson interviewed each other on Twitter for the Grammy Awards' "The World Is Listening" artist interview series on Wednesday.

"@kelly_clarkson And speaking of the engagement, since you are going to be my daughter-in-law, I'm singing at the wedding, right??" McEntire tweeted.

"@reba Obviously! My request is "Let's Get It On" by Al Green. That's not awkward, right?" Clarkson replied.

"@kelly_clarkson We may have to talk about that one later…" McEntire said.

Clarkson announced her engagement to Blackstock on Twitter on Saturday. She began dating the Nashville talent manager, who has two children, in late 2011.

Click through the slideshow below for more engaged celebrities.

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  • Aaron Paul and Lauren Parsekian

  • Neil Patrick Harris and David Burtka

  • Angelina Jolie and Brad Pitt

  • Halle Berry and Olivier Martinez

  • Jay Cutler and Kristin Cavallari

  • Kate Hudson and Matthew Bellamy

  • Lake Bell and Scott Campbell

  • Jesse Metcalfe and Cara Santana

  • Shane Warne and Elizabeth Hurley

  • Jessica Simpson and Eric Johnson

  • Kristen Bell and Dax Shepard

  • Naomi Watts and Liev Schreiber

  • Amy Adams and Darren Le Gallo

  • Jennifer Hudson and David Otunga

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