Adam Lambert is known for his sexy on stage antics, and he's at it again. The 'American Idol' finalist planted a kiss on his bass player Tommy Joe Ratliff during a concert at JCB Hall in Tokyo, Japan.

Last November, the singer shocked the crowd during his performance at the American Music Awards when he grabbed his crotch, made out with an androgynous keyboardist and simulated a sex act with his male guitarist.