As PG as Justin Bieber‘s Baby tour may have seemed from the audience, things apparently got pretty rough and tumble after the lights went down.

Sean Kingston, who opened for Bieber during the 2010 tour, has been served a with a lawsuit. A woman claims that Kingston was involved in a group attack on her, according to RadarOnline.com.

Sean Kingston In Studio @ 92.3 NOW [Photos] >

The 22-year-old “Beautiful Girls” singer was served with a civil summons and complaint last week by a Miami-based private investigator. The Kingston camp has made no official comment regarding the complaint and lawsuit.

Between injuring women in jet ski accidents and being accused of beating the bejebus out of them, maybe it’s safe to say Sean Kingston is too bad boy.

Interview: Sean Kingston In Studio @ 92.3 NOW

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