Get bratty with "X Factor" superstar Cher Lloyd.

Meet pop music's favorite new brat. Cher Lloyd first turned heads on the U.K. version of "The X Factor," where notorious grumpster Simon Cowell called her performance of Shakespeare's Sister's "Stay" "the performance of the entire season" -- and it was the first song she didn't rap on. (Because did we mention she can rap? Because she can.)

Cher blends electro, hip-hop, and pop influences into a genre-bending mix, all delivered with a wink. Think Lily Allen meets Nicki Minaj. "You're a hater, just let it go," she sings on inspirational kiss-off "Swagger Jagger," while "Want U Back" firehoses an ex-boyfriend ("You never had much game") and his new girlfriend, before admitting she might be jealous.

The pop misfit just made Billboard's "21 Under 21" list, performed on the "Today" show, and already dropped her first perfume, "Pink Diamond" -- not bad for a 19-year-old. Cher's debut album, Sticks + Stones, drops in the U.S. on Oct. 2, yet she's already locked in die-hard fans, who call themselves "The Brats."

"I've never met such passionate people in my life," Lloyd says. "Whenever I go into an event, I know they've got my back. It's all about having the girl power." And all about dropping her "Want U Back" signature grunt, though Lloyd says getting growly isn't easy. "I did it in the studio, and I was actually angry at that point. But I don't do it when I'm on stage," she says. "I don't want someone to take a snapshot of that." Get your Rick Ross on, li'l mama. UGH! (Do I sound like a helicopter?)

+ Download Cher Lloyd's "Dub On The Track," watch her perform "Want U Back" below, and check out more videos and interviews with her after the jump.

Cher Lloyd Performs "Want U Back":

Cher Lloyd Meets New York City's Biggest Brats:

Cher Lloyd Talks Musical Process, Fans, And More:

Cher Lloyd Performs "Beautiful People":

Cher Lloyd "Want U Back" Music Video: