Justin Bieber, Lady Gaga, Britney Spears, Mariah Carey

“Girlfriend” singer Justin Bieber goes for a hike in the Hollywood hills.

“Million Reasons” singer Lady Gaga out and about in Los Angeles.

“…Baby One More Time” singer Britney Spears heads to a dance class in Los Angeles.

“Heartbreaker” singer Mariah Carey heads out and about in Beverly Hills with her new boyfriend, choreographer Bryan Tanaka.

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