Good singer and good actor & actress:
Sting(Lock, Stock and Two Smoking Barrels)
Jon Bon Jovi(Ally McBeal(TV), Pay It Forward)
David Bowie(Hunger, Labyrinth, Senjo no Merry Christmas)
Gren Frey(Miami Vice(TV), Jerry McGuire)
Olivia Newton=John(Grease, Two of a Kind)
Vanessa Williams(Eraser, Soul Food)
Joan Jett(Light of the Day)
Ray Charles(The Blues Brothers, Spy Hard)
Will Smith(i, Robot, An Enemy of America, Men In Black)
Harry Connick Jr(Copy Cat)
Good singer but bad actor & actress
Mick Jager(Freejack)
Tina Turner(Mad Max: Thunder Dome)
Alice Cooper(Nightmare on Elm street)
Bad singer and Bad actors & actress
Bjork(Dancer in the dark):
I hate her voice. And "Dancer in the dark" depressed me.
Beyonce(Austin Powers 3, The Pink Panther):
Why is she actress? I don't understand
Mariah Carey:
Why is she actress? I don't understand