Taking a break from her "X-Factor" efforts for a music-filled weekend in Sin City
, Britney Spears
was a special guest at the 2012 iHeartRadio Music Festival in Las Vegas, Nevada on Friday night (September 21).
The "Gimme More" singer donned a sexy leather LBD while rocking dyed hair tips as she posed backstage alongside Ryan Seacrest
before taking the MGM Grand Garden Arena stage as one of the celebrity presenters.
With other stars roaming ...