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Recognize the Reveler

Fame Pictures

He's apologized for a headline-making incident with a former girlfriend, but now he's also wearing it around his neck.

This disgraced hip-hop singer sported a blingin' "Oops" necklace while shooting a cameo in Keri Hilson's new music video in Hollywood.

After his reprehensible actions, we're surprised any girl is still willing to work with him.

Think you know who's supposedly sorry? Find out after the jump...

Chris Brown

Fame Pictures

It's Chris Brown, who pled guilty to assaulting his ex-girlfriend, Rihanna. He's due back in court next week for sentencing stemming from the incident.

Meanwhile, Rihanna has been keeping busy in Vegas. Last night, she caught the Kings of Leon concert at the Hard Rock Hotel and Casino.

The songbird spent her day lounging in a private cabana at the pool. After the concert, she stopped at Rare 120 for a late-night bite.

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See the way they were in our retrospective gallery of the troubled twosome!