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.

With more than 150 acts spread across its eight stages, Lollapalooza 2010 was a long, loud, always entertaining - and at times, historical - weekend for dozens of reasons. Here's 12 videos, shot by the fans themselves, that'll make you wish you'd been there.