I believe that Ian McKellan appeared in a Pet Shop Boys video. I am not sure, though.
Rules
Soundtracks don’t count if the mentioned celebrity appears ONLY on scenes extracted from the movie. Thus “(You Drive Me) Crazy” is accepted but “I’ll Disappear” isn’t.
Collaborations between performers don’t count either (for example Luther Vandross and Mariah Carey’s rendition of “Endless Love”), since both artists are performing and thus do not enjoy the status of celebrity invitees.
Aresenio Hall was in a Paula Abdul video.
A buncha models were in a George Michael video (“Freedom”?).
Captain Lou Albano was in Cyndi Lauper’s “Girls Just Wanna Have Fun”
I can’t remember the Group, but Claire Danes was in a video in which she played the ugly girl with the mishappen back who sprouted angelic wings at the prom.
Kid Rock appears in a new Hank Williams Jr video, I don’t believe he’s performing, just being there.
Joey Lawrence was in the video for Clint Black’s song “Summer’s Coming”, this was back when he was on “Blossom” and counted as famous I suppose. There were a couple other famous people in that video. Memory fails me.
Nobody’s mentioned Johnny Depp in “Rebel without a Clue”?
Ralph Nader is in a Rage Against the Machine video. Sure, you can say Bush and Gore are in it more often and and it’s just a clip of a speech, but he does mention it in his press releases.
Dee (from What’s Happenin’) was in Public Enemy’s ‘Fight the Power’…maybe she’s not really famous, but I always thought it was funny every time I saw that video.
Keanu (sp?) Reeves was in one of Paula Abdul’s videos; I think the name of it was Rush.
The Rock (that wrestler with the weird arching eyebrows) is in a new video with Wyclef Jean (he also ‘sings’ the chorus)
BTW, the GhostBuster’s theme song was done by Bobby Brown.