Leah Greenblatt
June 05, 2009 AT 04:00 AM EDT

You’ve heard them in commercials. You’re dying to know what they are. We solve the mysteries!

· As a partygoer strolls through the revels of eras past in this Bacardi clip, quirk-pop duo Matt & Kim‘s obscenely catchy ”Daylight” (from 2008’s Grand) provides the jaunty soundtrack.

· Toyota commissioned L.A. singer (and a cappella cover-song whiz) Petra Haden to take on the Bellamy Brothers’ 1976 lite-FM classic ”Let Your Love Flow” for their candy-colored Prius clip.

· In April, Victoria’s Secret used harp-playing folkstress Joanna Newsom; now they’re selling BioFit bras to the slithery stomp of electro-pop Brit Little Boots‘ ”Meddle,” from last year’s Arecibo EP.

· Citibank puts well-deserved money in Chicago indie stalwarts the Sea and Cake‘s pockets by using the jazzy ”Jacking the Ball” from their 1994 self-titled debut in a series of 30-second spots.

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