Christina Aguilera: Download My Music, I'll Kick Your Ass!

Christina Aguilera hushes photographers while arriving back at her hotel with her sleepy son, Max, on Tuesday (May 17) in NYC.

The night before, the 30-year-old Voice coach made an appearance on The Late Show with David Letterman to read the Top Ten list.

Some of her top ten tips for aspiring singers: “If your name is Larry, change it to Larry Bieber”; “Be a triple threat: I’m a singer, actress, and part-time tax accountant at H&R Block”; and “Listen to as many different styles as possible, but if you illegally download my music, I’ll kick your ass!”

Christina also poked fun at her flub during this year’s Super Bowl, saying, “Learn the lyrics to the National Anthem.” Ha!