The Bus

Just saw Jamie Foxx's video for "Blame It on the Alcohol" and was laughing at the cameos. I won't ruin it for you, just watch.

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Then I thought... What video has the most cameos? Big Pun's "It's So Hard" had a lot of cameos:

chris_sc77

I remember being impressed at P. Diddy's "Victory" video cause of the stars in t at the time...

ScissorPuppy

Yeah, I found a whole other reason to laugh at the Jamie Foxx clip :O)

This Michael Jackson video is nothing but cameo's, all asking " Where's Michael?"

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Mikael79

We Are All Made of Stars by Moby had a lot of former stars in it.

DJLinus

Clearly, the winner's Pulp's "Bad Cover Version":

wendersfan

Jason Bovberg

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The Cow

I don't know how many, but there are a bunch of cameos in the Sam Kinison "Wild Thing" music video.

goodwill

Not really cameos since they all sang the song too, but this is the first thing that came to mind...

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Sonny Corinthos

This is the first one I thought of as well.

RichDB10

Didn't Nickelback's 'Rockstar' have a few also...i'm from the UK so most of you being Stateside will you probably recognise more of them than me

j123vt_99

Yep.. Had a bunch

Would "We are the World" be cheating?

Mondo Kane

First 1 that came to mind.

Travis McClain

Hank Williams, Jr.'s "All My Rowdy Friends Are Coming Over Tonight"
Johnny Cash's "God's Gonna Cut You Down"
Garth Brooks's "We Shall Be Free"

Not sure the final count of any of these three, but there are quite a lot.