Boogeyman II (1983)

"Mirror mirror... on the wall... who's the deadest of them all!"

Lacey, the shaken survivor of a bloody supernatural rampage in the countryside, is flown to Los Angeles where a slick movie producer plans to cash in on her story. At a decadent Hollywood party, plans for the beginning of a new horror movie franchise are torn asunder when a fragment of the original haunted mirror turns these hotshot movers and shakers into screamers and quakers!