LEANN RIMES had better watch her back, according to the former mistress of ‘serial cheat' EDDIE CIBRIAN.

The singer who finally fessed up to her affair with the actor last month, has been issued a stark warning by SCHEANA MARIE JANCAN.

Scheana claims LeAnn wasn't the only lover Casanova Eddie had on the side while he was still married to BRANDI GLANVILLE.

She says: "Eddie's with LeAnn now, but it's just a fling. Eddie cheated on Brandi. He cheated on me. He's going to do it to LeAnn."

The bitter model still can't believe she lost out on love to the Blue singer: "I knew they were co-stars, and I didn't notice much chemistry between them in the movie."

"He's (Cibrian) still never given me a 'Sorry, we're done'. He hasn't ended it with me."

Er, word to the (not so) wise, Scheana - he's publically started a relationship with another woman, we reckon that's him ending it.