The 53rd annual Grammy Awards don't officially begin until 8PM tonight (Feb.13), but Tinsel Town is already aglow with the hundreds of stars who have descended on Hollywood for music's biggest night.

Whether they were rehearsing for their awards-show performance, picking up swag in the Grammys gift suites, or partying their butts off at one of the dozens of industry soirees, A-list celebs -- including Lil Wayne, Justin Bieber, Rihanna, Bruno Mars, Beyonce, Cee-Lo Green, Nicki Minaj, Drake, Whitney Houston, Miley Cyrus, and many more -- were out in full force all weekend.

Check out special pre-Grammy interviews with the nominees, pics from all of the pre-Grammy events, and stay tuned to Billboard.com all night for up to the minute coverage of Grammys 2011.

PHOTOS: GRAMMY PRE-PARTIES, REHEARSALS

Bruno Mars Plays Pre-Grammy Party with Monica, Keri Hilson

Arcade Fire Play Secret Pre-Grammy Concert for 500 Guests

More Grammys 2011 Coverage:

2011 Grammys Central

Grammy Predictions: Who Will Win?

Best New Artist Nominees Up Close

40 Most Outrageous Grammy Fashions

10 Best Grammy Performances (2000-2010)