R&B singer Omarion is facing a lawsuit from two fans who claim they were beaten up at one of the star's shows.

The Ice Box hitmaker, real name Omari Grandberry, is being sued by Brunel Jordonne and Kenson Sainvilus, who claim they were caught up in a fight at the singer's concert in Newburgh, New York in September (12).

In the lawsuit, which also targets bosses of the Ole Bar & Grill gig venue, the two men insist Omarion and his team should have provided better security, according to Tmz.com.

Both men were reportedly hospitalised after the incident and are demanding unspecified damages.