R&B singer Usher headlined KIIS FM’s 2010 Wango Tango Concert Saturday night (May 15) at the Staples Center in Los Angeles.

The bill of performers also included Justin Bieber, Ludacris, Ke$ha, Akon, Adam Lambert, B.o.B. and Kelly Rowland. In addition, folks like Ryan Seacrest, Rob Kardashian, Jason Derulo and others were spotted posing for pictures on the red carpet of the annual concert event.

Check out 30+ pictures of everyone below and when you continue reading…