Britney Spears rocks pink and green hair extensions at iHeartRadio

Don't worry, Britney Spears fans -- yes, her hair is pink, but no, she's not returning to the days of the hot pink 2007 wig. All is well.

Spears flew to Vegas to present at the iHeartRadio music festival with Ryan Seacrest, and when she stepped on stage, she was wearing teal and pink extensions in her hair. Perhaps influenced by her fellow "X Factor" judge Demi Lovato's ever-changing do?

Though she was all smiles at the event, Spears' manager Larry Rudolph recently suggested that all may not be well in the Britney Universe. After "Glee" lampooned her 2007 downward spiral with last week's episode, some fans were disappointed and felt that the show was bullying Britney... and Rudolph agreed.

"I can tell you that Britney's manager, Larry, is livid. He's not happy," said Billy Bush on Access Hollywood.