Let It All Hang Out

Demi Lovato presented at the 2012 iHeartRadio Music Festival held at the MGM Grand Garden Arena last night, September 21, in Las Vegas.

The singer was on hand to introduce Green Day with Extra co-host, Mario Lopez. Demi rocked her brand new bangs with her blonde hair super straight. Her short black dress was cute, too.

Demi also mingled with American Idol host Ryan Seacrest backstage at the music festival, as well as taking part in a few interviews.