LL Cool J
Did you know that before LL was on NCIS: Los Angeles, he did a bit of rapping? To prove it, he appropriated a bit of "Mama Said Knock You Out" while hosting the show.
Beyoncé
The I Am...Sasha Fierce singer scored the most nominations of anyone, 10 in all.
The Black Eyed Peas
The band had concertgoers (and themselves) dancing on the tables during its performance.
Lady Gaga
Remember, kids: Just because you light stuff on fire, it doesn't mean you'll get multiple Grammy nominations. (Though we hear it happens.)
Keith Urban
Best Rap Album? Nope, but Nicole Kidman's crooner is up for a Best Country Album trophy among his four nods.
Kanye West
Three of the nominations in the Best Rap/Sung Collaboration include this guy. That should feed his "Ego."
Kevin Jonas & Joe Jonas
Where's the other JoBro? Onstage behind them and ready to debut his side project, Nick Jonas & the Administration.
Katy Perry
The singer did some presenting as she read off the nominees for a Rock award.
U2
The venerable Irish band is up for Best Rock Song and Album awards.
Dave Matthews
We want him to win so people will be forced to say the name of his disc, Big Whiskey and The Groogrux King.
Sugarland
The much-loved country duo performed during the concert and are up for one Grammy.
Taylor Swift
The terrific teen earned eight—count 'em—nominations for being awesome.
Jay-Z
The rap mogul picked up four nominations, including two for his collaboration with Rihanna and Kanye West, "Run This Town."
Madonna
Madge is up for the Best Dance Recording award.
Bruce Springsteen
The New Jersey crooner has four chances to win a Grammy, and we never bet against this guy.