Stepping out for one of the hottest spring concerts, Britney Spears attended 102.7 KIIS FM's Wango Tango at The Home Depot Center in Carson, California on Saturday (May 11).

The "Scream & Shout" singer showed off her hard work in the gym in a short one-sleeved black dress with gold heels as she co-hosted the event with Ryan Seacrest.

Performers at the show included Brit's pal will.i.am, Bruno Mars, Maroon 5, Demi Lovato, Avril Lavigne, and Fall Out Boy.

Stoked for the opportunity, the 31-year-old pop star tweeted, "Wango Tango with @1027KIISFM today :) Who's pretty faces will I be seeing out there?"