Britney Spears and 'NSYNC top the list of music nominees for this year's Nickelodeon Kids' Choice Awards, to be broadcast live on the network April 21.

Spears is nominated in the Favorite Female Singer category, along with Christina Aguilera, Jennifer Lopez and Pink, while 'NSYNC join Backstreet Boys, Destiny's Child and Baha Men in the Favorite Singing Group nominations. (MTV's parent company, Viacom, also owns Nickelodeon.)

Lil' Bow Wow, Ricky Martin, Sisqó and Will Smith are up for Favorite Male Singer. Lil' Bow Wow's "Bounce With Me," 'NSYNC's "Bye, Bye, Bye," Spears' "Oops, I Did It Again" and Baha Men's "Who Let the Dogs Out" are nominated for Favorite Song.

Janet Jackson received a nomination for Favorite Movie Actress for her role in "The Nutty Professor II: The Klumps."

Rosie O'Donnell will host the awards, which will be held at the Barker Hangar in Santa Monica, California.