Singles file: Lupe Fiasco f. Bruno Mars, Lissie, R. Kelly vs. Baths

Lupe Fiasco had it first, but B.o.B. made it a hit. (By Rafael Crisostomo For The Washington Post)

A weekly playlist for the listener with a one-track mind...

Special Strange Bedfellows edition!

Lupe Fiasco featuring Bruno Mars: "Nothin' on You" (original version)

Before it became a No. 1 hit for B.o.B., this track belonged to luckless Lupe Fiasco, whose original, less soulful version just leaked.

Lissie: "Pursuit of Happiness" (Kid Cudi cover)

Alt-hip-hop, Lilith Fair and too much tequila meet in this ferocious, adorable live clip from the Illinois folkie's recent concert in Brighton, England.

R. Kelly vs. Baths: "Maximal Burns"

The crazy-bringing R&B potentate pairs with the emerging L.A. chilltronic act on this profoundly inventive, profoundly good mash-up courtesy of the folks at the Hood Internet.

Deer Tick: "Sun Street" (Katrina and the Waves cover)

The usually somber country-rockers contribute a jaunty cover of the KATW rarity, issued in commemoration of the 25th anniversary of "Walking on Sunshine."

Miley Cyrus featuring Lil Jon: "Can't Be Tamed (Rock Angeles remix)"

Lil Jon yells over a Britney-channeling Miley on this crunk-y, entirely unessential yet inexplicably entertaining redo.