Joe Jonas frolicked around shirtless, Kristen Stewart and Robert Pattinson got cozy together while watching bands, and Katy Perry partied hard once again for Weekend 2.
[Joe Jonas. Shirtless.][Joe Jonas][Robert Pattinson, Kristen Stewart][Kristen Stewart][Kristen Stewart][Katy Perry][Rosie Huntington-Whiteley][Dree Hemingway]