#1. Rehab
by Amy Winehouse

Amy Winehouse is so confident she's got the goods on Rehab that she starts her vocal a half beat before the music comes in. She's not a foreplay kind of gal. What she is is mouthy, funny, sultry, and quite possibly crazy. "They tried to make me go to rehab/ I said 'No No No,'" she announces, and while real life indicates she ought to reconsider, it's impossible not to be seduced by her originality. Combine it with production by Mark Ronson that references four decades worth of soul music without once ripping it off, and you've got the best song of 2007.