Celebritypix/Meet The Famous
03/29/2010 at 05:00 PM EDT
and Ashlee Simpson Wentz
were bopping up and down from the side of the stage at Jay-Z
's recent show at Los Angeles's Staples Center – and the two didn't go unnoticed by the rapper. "Pete Wentz, I see you," he said from the stage, adding, "Ash, I see you. Hope I didn't embarrass you." Standing next to them: Chris Rock
, who threw his hands up and sang along to every song, while Justin Bieber
and Paris Hilton
were also at the show.