Sound: R&B-tinged pop
Hit: "Chasing Pavements"
The skinny: Big voice, big personality, big talent, big favorite despite lack of a huge hit
Odds of winning: 3 to 1
From: Wales originally, London now
Sound: Retro R&B
The skinny: She's played lots of high-profile gigs in the States, but her voice and talent are limited.
Odds: 5 to 1
Ages: 16 to 21
From: Wyckoff, N.J.; Los Angeles now
Sound: Classic teen pop
The skinny: While the three brothers started in Disney's tween world, they are commanding industry respect for their talent and smarts.
Odds: 8 to 1
Ages: 24 to 26
Sound: Contemporary pop/rock-informed country
Hit: "Love Don't Live Here"
The skinny: Noncountry fans might confuse this coed trio with the coed quartet Little Big Town.
Odds: 12 to 1
Sound: Contemporary soul
Hit: "Need U Bad"
The skinny: There is range and depth on her debut, "Fearless," but she is little known outside R&B circles.
Odds: 50 to 1