Hot Summer Party Nights!

J. Lo gets low! Gerard sings karaoke! Paris pops bubbly! See how the stars spend their hot summer nights

  • BEYONCÉ KNOWLES photo | Beyonce Knowles, Jay-Z

Credit: Rob Loud/Getty; Mark C. Austin/Startraks (inset)

Updated: Wednesday Aug 04, 2010 | 06:00 AM EDT By: Alison Schwartz


She's his No. 1 fan: Beyoncé feels Jay-Z's beat, while the rapper tears up the stage at June's Bonnaroo Music and Arts Festival in Manchester, Tenn.