NEW BOOTIE TOP TEN: Or Top 25 since they had a few months off. Stuff I'm really liking this time:

Clivester's "Heartbreaking Maps," which uses Karen O's vocals from "Maps" to great effect.

Clockwork set Lil Wayne's "Hustler Musik" to the theme from The Office and it is just compulsively listenable. One thing mashups have proven is that the range of background beats you can successfully use with hip-hop is far greater than what actually gets used.

DJs From Mars did a rockin' more-a-remix-than-a-mashup of "Tik Tok" and some Queen beats.

Go Home Productions' somewhat unlikely pairing of "Like A Virgin" and "Baba O'Riley" is the most tremendous thing ever. I listen to it repeatedly when I'm in the mood and think Madonna singing over Pete Townshend and company is the most natural thing in the world (and I don't miss Daltrey at all--sort of makes me think he's the least essential Who member, which is no doubt unfair, and also a sign of my unseriousness as a musicologist.)

Mighty Mike's two contributions are wonderful. The Lily Allen vs Robert Palmer one manages to out-ironize and out-funny the original Allen song, "Not Fair." And "Under Pressure" vs MGMT is a classic A vs B mashup.

And Victor Menegaux provides necessary musical recycling by wrapping the lyrics of Limp Bizkit's "Nookie"--which might be the worst radio hit of all time--around Owl City's "Fireflies." Irony is back in 2010!