Photos: Dave Benett, Getty Image | Dimitrios Kambouris, WireImage | Samir Hussein, Getty Images

Pop star Ke$ha certainly has a unique sense of style. The look, which she's described as "garbage chic" involves pulling together random pieces for a just-back-from-the-Salvation-Army type of effect.

Over the weekend, her especially peculiar combination of micro flag-motif shorts, mid-calf boots, and a wide black-feathered top made us think of garbage chic, alright. But more like recycling chic -- we've seen similar looks before.

Since we're all about fashion math at StyleList, we decided on the equation of Geri Halliwell's Union Jack minidress plus Lady Gaga's feathered corset to equal Ke$ha's "patriotic crow" ensemble.

Take a look at the photo below, and browse through more shots of celebs wearing questionable outfits: