By day, Gregg Gillis is a biomedical engineer in Pittsburgh.
By night, he's Girl Talk, creator of Night Ripper, the sample-dense mash-up mix that was one of last year's most fun albums. He's also an in-demand remixer and DJ. Tonight, he plays a sold-out show at Johnny Brenda's.
Whereas typical mash-ups layer two or three songs together, juxtaposing the Strokes and Christina Aguilera, for instance, Gillis lists 167 artists sampled among Night Ripper's 16 short tracks. "Warm It Up," for example, includes bits of Elastica, Ciara, the Black-Eyed Peas, Annie, Kansas, Boyz II Men, Kelis, Smokey Robinson, and MARRS. And probably much more (obsessives have been cataloging the samples on Wikipedia).