As LeAnn Rimes turns 27 today, look back at other stars who have come between couples
LeAnn Rimes and Eddie Cibrian
The married country star got cozy with also-married actor Cibrian on the set of her Lifetime flick, Northern Lights. Although he denied an affair (despite Us reporting exclusively on the costars' secret dates), he and Rimes officially debuted their relationship last week. After Cibrian filed for divorce, wife Brandi Glanville slammed him for being a "compulsive liar, cheater and a home wrecker," adding that he is an absentee father to their two children.