John Mayer, ''Who Says''
Who says the life of a rock star sexy entourage, late-night pool parties, nubile young things dancing on banquettes is just a mask for acoustic ennui? John Mayer, that's who. B
Leona Lewis, ''Happy''
Here comes the bride! Maybe! The chanteuse finds amor in Cuba, but things are not what they seem in this shamelessly Harlequin-esque, muy engrossing romance. A-
Alicia Keys, ''Doesn't Mean Anything''
One minute you're living it up in your swanky NYC high-rise; the next it all dissolves into vapor and you're stranded in a CGI desert. As a real estate metaphor, fascinating. In a music video, not so much. C+
Adam Lambert, ''Time for Miracles''
Who else can stride through fire, rubble, and other end-of-the-world detritus with nary a smudge to his doomsday-proof guyliner? The Idol star delivers all the bombastic camp required in his operatic power ballad from the upcoming disaster-porn flick 2012. B+
Lily Allen, ''Who'd Have Known''
An obsessed Allen lures ''Elton John'' to a secret lair and ties him up (shades of Misery, minus sledgehammer shenanigans). But why does her Rocket Man stand-in look like Truman Capote in a wig? B-
Taylor Swift, ''Fifteen''
Swift's poignant recounting of teenage vulnerability receives a reverential, almost painterly treatment (fireflies, blossoms, moonlight). Alas, the impact of lines like ''Abigail gave everything she had/To a boy who changed his mind'' gets a little lost in all that dreamy set design. B