They are officially separated but Thicke wore his wedding ring through the show in Fairfax, VA and told the crowd:
"For y'all that don't know me and my wife separated, but I'm trying to get my girl back. She's a good woman." He also told fans he'd written the song "Lost Without U" for Paula ... before launching into the hit -- which we gotta say is kinda the perfect song for a guy trying to get back on a chick's good side.
Robin knows he's messed up big time and he's now doing all he can to win his woman back.
