Britney Spears, who was characterized as mentally unsound by her mom's legal team recently, was tapped by Los Angeles' KIIS FM to guest-host with Ryan Seacrest at this weekend's annual
Wango Tango concert at the Staples Center.
Fans enjoyed a diverse roster, according to MTV News, including performances from Jennifer Lopez, Ke$ha, Selena Gomez, Cobra Starship, T-Pain, Lupe Fiasco, Cody Simpson, Far East Movement and 'Glee' star Matthew Morrison.
Ke$ha brandished her famous glitter gun for her second year appearing at Wango Tango. And J.Lo rocked her spangled catsuit, but was hampered by a sudden, serious audio glitch (video after the jump). For a long stretch of her single 'On the Floor,' the 'American Idol' star had to improvise booty bumps after her mic went out.
Fan video on YouTube shows a smiling Lopez in her best show-must-go-on mode when she realizes the sound system has failed mid-performance:
Britney Spears can be seen here taking the stage with Seacrest, who does a lot of the heavy lifting as the more experienced emcee:
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