Last night, Selena Gomez celebrated her birthday at the Teen Choice Awards in Los Angeles. When she accepted the Choice Music Group Award for her band, Selena Gomez and the Scene, she was serenaded with an audience rendition of "Happy Birthday" and presented with a platter of sparkler-topped cupcakes. The birthday girl also stunned on the red carpet in a fuchsia minidress.

"This is the best birthday ever," she said.

While the pop star may turn 20 today, she's not leaving her teen years behind any time soon. She once told Latina Magazine, "I feel very young at heart, and I still want to jump up and down on my bed singing and rocking out." And the former Disney starlet is true to her word -- whether she's lip-syncing to "Super Bass" backstage or pranking her fans, Selena definitely has a youthful spirit. In honor of Selena's passage into adulthood, we looked back and collected 10 of her funniest/most adorable moments. Click through the slideshow below to see them for yourself!

Are you a Selena fan? Which moment had you laughing the most? Sound off in the comments below or tweet @HuffPostTeen! (Don't forget to tag @selenagomez, too.)

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  • "Super Bass"

    Last year, Selena posted a video on her YouTube channel of her lip-syncing along to Nicki Minaj's "Super Bass." Do you think she has it down?

  • Selena Pranks A Fan

    Selena pranked one of her fans on Disney Channel's <em>Prank Stars</em>. She pretended to be just a typical teen at a casting audition. Wait unti you see the fan's reaction!

  • Cupcakes With Taylor

    Sure, Selena may be famous, but she still has low-key nights with friends, too. She posted these <a href="" target="_hplink">adorable snapshots</a> of her and Taylor Swift goofing off, dancing, baking cupcakes together.

  • "Fifty Shades Of Blue"

    When Selena got swept up in the <em>Fifty Shades of Grey</em> craze, she decided to put her own spin on it. She <a href="" target="_hplink">teamed up with Funny or Die</a> to create this entertaining spoof, "Fifty Shades of Blue." Think she's the right actress to play Anastasia Steele?

  • "Call Me Maybe"

    By now, "Call Me Maybe" parodies are a dime a dozen. But Selena -- along with Justin Bieber, Ashley Tisdale, and Martin Johnson -- created <a href="" target="_hplink">one of the first lip-dubs</a> of Carly Rae Jepsen's smash single way back in February. Think of it as a home movie with your friends... who just happen to be mega-successful celebrities.

  • George Lopez Interview

    Selena was scheduled to appear on George Lopez's talk show right after her 18th birthday, but lost her voice the morning of the interview. Rather than canceling the appearance, she answers with an automated voice device and giggled the entire way through. Check it out!

  • "I Want It That Way"

    Selena may have been just a kid when the Backstreet Boys came out with "I Want It That Way," but she and her band do a pretty enthusiastic cover backstage on tour!

  • Kiss Cam

    Justin Bieber and Selena Gomez were caught on the kiss cam at a basketball game. While Justin was into the kiss, Selena <a href="" target="_hplink">later called </a>the moment "the most humiliating thing that's ever happened to me."

  • Meeting Shia LaBeouf

    Even celebrities can get star-struck from time to time! When Selena meets Shia LaBeouf, her reaction is priceless: "Oh my gosh, he's so handsome!"

  • "Hit The Lights"

    Selena's music videos are typically upbeat and silly. This one for "Hit The Lights" is no exception! Watch her sing and dance along with gigantic balloons, kids drumming on watermelons, and paint splatters.