PHOTO: Britney Spears rocks rainbow hair at the iHeartRadio Music Festival
Brit took the stage with Ryan Seacrest to introduce Miranda Lambert
Listen to Britney Spears on iHeartRadio
Britney Spears joined Ryan Seacrest on-stage at the iHeartRadio Music Festival in Las Vegas Friday night rocking a colorful new 'do. Check out the pic and vote: are Britney's rainbow locks hot or not?
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