Selena Gomez fans were excited for the beautiful young actress not only for her winning a Teen Choice award Sunday, but because they were able to celebrate her birthday with her.

Gomez sported a pink Dsquared2 dress and Herve Leger heels at The Teen Choice Awards 2012, which took place July 22. She was serenaded by dozens of celebrities, including Taylor Swift, Josh Hutcherson, Ellen DeGeneres, Zooey Deschanel, and Jonah Hill, after collecting a surfboard for her band, Selena Gomez & the Scene, who won Choice Music Group.

US Weekly reported that as the star-studded crowd sang "Happy Birthday," Gomez blew out sparkler-topped cupcakes, which she later shared with audience members. Kevin Hart and "The Vampire Diaries" star Nina Dobrev presented the award and both ushered everyone in the audience to sing to Gomez.

Yahoo TV reported that at one point during the serenade, Gomez buried her face in her hands clearly embarrassed but happy.

"This is the best birthday present ever," Gomez told those gathered at L.A.'s Gibson Amphitheater.

Bieber and Gomez sat in the front row of the show. The 18-year-old also won an award of his own, choice male artist. He also performed hit singles "Boyfriend" and "As Long as You Love Me."

On July 23, Gomez raved about her unforgettable day via Facebook. "Beyond blessed. So much love," she wrote. "Thank you for the most incredible birthday yet! I'm truly, truly grateful. I love my family, friends and all of you."

Post-show, Gomez and Bieber had a romantic dinner at Il Cielo in Beverly Hills. "Selena walked out the front holding hands with Justin and she was holding a bouquet of flowers," a source tells Us Weekly.

Numerous reports are speculating that the couple is preparing to move in together. They have been dating for over a year.

The couple, who have been dating for over a year, was spotted shopping together at a local Target in Calabasas, California while shopping for kitchen appliances and stopped to take pictures with fans.

"Whether or not the appliance was an actual gift, it's quite obvious that Justin, 18, and Selena are certainly playing house together! We already know they have a wedding in their future, so why not live together already!" Hollywood Life reported.

Is the couple too young to take this next big step? We will never know until it actually happens.