Video: Today Show : Britney Spears on the cover of Rolling Stone magazine

There's an understanding among those who know Britney Spears well: When she's blond, she's happy. When she's brunette, she's sad. When she's pink, she's crazy. Photograph by Peggy Sirota for Rolling Stone Her hair was back to glowing and golden this fall, when she spent her time diligently shuttling back and forth from her Beverly Hills mansion to dance rehearsals and video shoots and recording studios, in preparation for her new album, Circus. It [...]