Denise Richards and Motley Crue bassist and radio host  Nikki Sixx have ended their brief romance, TooFab has exclusively learned.

Sources tell TooFab that the pair, who are neighbors in L.A., remain good friends, but that they decided that their relationship is better as pals and as neighbors.

A week after word got out in mid-December that Richards, 39, and Sixx, 52, were dating, they went public and were spotted hand-in-hand outside a movie theater in Calabasas, Calif.