POTW: Kevin Jonas, Jay-Z, Lady Gaga, Rihanna
Lady Gaga expresses her animalistic side while crowd surfing during the Semi Precious Weapons' Lollapalooza show on Aug. 6.

Cut Copy, Hot Chip, Chromeo Keep It Funky

Guitars definitely dominated the Lollapalooza lineup, but sprinkled amongst the multitude of bands who wanted fans to rock out were a few party-starting groups who brought the rave. Among them were Australia's Cut Copy, who got hands waving and feet moving on Saturday afternoon, and London's Hot Chip who warmed up the Friday masses for a blazing sunset set by Montreal electrofunk duo Chromeo.