Jennifer Lopez Has Sound Problems, Chord Overstreet Debut New Hair At Wango Tango [PHOTOS]

Britney Spears and Ryan Seacrest hosted last night’s annual Wango Tango music festival at the Staples Center.

Performing was a mix of pop and hip-hop from acts including Ke$ha, Jennifer Lopez, Pitbull, Ne-Yo, Selena Gomez, Matthew Morrison, Lupe Fiasco, T-Pain, Jason Derülo, Far East Movement, Cobra Starship and newcomer Cody Simpson.

PHOTOS: Justin Bieber Performs And Ke$ha Plays With Stuff At 2010 Wango Tango

Jennifer Lopez ran in to an audio issue during the middle of her performance. The sound went out, which left Jennifer and her crew to sing and dance in silence. Luckily, the sound came back on, and Jennifer declared, “Nobody keeps mama down!”

On the red carpet, Glee star Chord Overstreet debuted a new hairstyle (take that Dianna Agron). Gone were his famous side-swept bangs and blonde hair! Say hello to the brunette Chord Overstreet.

“At the end of the season, I just wanted a haircut, so I cut it all off,” he told Us Weekly. “I cut the highlights out.”

Check out all the photos from the red carpet and concert and then watch the Jennifer Lopez audio incident…