Jon Lovitz has agreed to play the Laugh Factory on Sunset Strip every Wednesday night for the rest of his life. That isn't a joke.... Fresh out of dignity, the '80s Eminem, Vanilla Ice, is joining wackadoodle Baldwin brother Stephen and down-and-out '70s pinup Leif Garrett on CMT's new reality show, Ty Murray's Celebrity Bull Riding Challenge, debuting Aug. 10.