Justin Bieber Goes to Selena Gomez's Concert Instead of Kim Kardashian's Wedding

The 2011 ESPY Awards - Backstage And Audience Singers Justin Bieber and Selena Gomez attend The 2011 ESPY Awards at Nokia Theatre L.A. Live on July 13, 2011 in Los Angeles, California. (Getty Images)more pics » Kim Kardashian (Bauer Griffin) That Justin Bieber is a keeper. The teen star opted out of going to the reality TV event of the year -- Kim Kardashian's wedding -- and instead was in Philadelphia to watch girlfriend Selena Gomez perform tonight!

There's some wild rumors that the teen couple will hop on a plane following the concert (since it's 3 hours earlier on the West Coast), but we find that a little hard to believe. Though, they'd probably make it in time for all of the really wild fun at Kim's big day!

Though the Bieb wasn't there to serenade the bride, we're sure she's having plenty of fun with her 440 guests. Stars in attendance included her famous family, of course, and: Demi Lovato, Babyface, Vera Wang, Mario Lopez, Mark Ballas, La La Vazquez and Carmelo Anthony, Eva Longoria and Eduardo Cruz, Ryan Seacrest and Julianna Hough, Alan Thicke, Maria Menounos, Sugar Ray Leonard, Venus and Serena Williams, Kathy Lee Gifford, Brittny Gastineau, Greta Van Sustren, Jillian Barberie, Brody Jenner and Avril Lavigne, Scottie and Larsa Pippen, and Dina, Ali and Lindsay Lohan. To name a few.

Major details (and pictures) of the "I dos" are being kept under wraps, but E! will air a special on Kim's big day Sunday evening at 6pm ET, then the 4-hour full wedding, Kim's Fairytale Wedding: A Kardashian Event, will air at the beginning of October.