LeAnn Rimes and Eddie Cibrian without a care in the world, celebrate LeAnn’s 28th birthday in what should be there favorite place ‘Sin City,’ at Tabu Ultra Lounge at the MGM Grand Hotel & Casino. Rimes and Cibrian, who both left their marriages after falling head over heels while filming a sappy Lifetime movie of the week, headed to Vegas after a short birthday stint in Cabo San Lucas Mexico for some R&R. Rimes, who never looked better, is probably basking in the quiet time alone with her live- in man now that his two young children, who he shares custody of, are always around.