gomez030111_01_X17230wm.jpgJustin Bieber and his older girlfriend Selena Gomez have signed on to be presenters at the upcoming Billboard Music Awards.

Bieber, 17, has been nominated for 11 Billboard Awards ... including one in the Top Artist category. We have a feeling Gomez, 18, will celebrate with Justin regardless of whether he wins, but he's bound to win at least a couple.

Other stars presenting at next Sunday's awards show: Kylie Minogue, Jada Pinkett Smith, Joe Jonas, Keri Hilson, Marc Anthony and Glee's Matthew Morrison just to name a few.

As for performances, the list is off the hook! Jennifer Lopez, Rihanna, The Black Eyed Peas, Keith Urban and Lady Antebellum plan on hitting the stage at the Las Vegas MGM Grand.

Find out who has the most nominations ... after the jump.