There are plenty of those around, I could mention:
Banned Cartoon Mashy-mash
The Three Little Pigs in Blitz Wolf. (Banned Cartoon)
but there are many more outside...

I saw this one
http://www.videosift.com/video/Swimming-with-Busby-Berkley-mashy-Footlight-Parade-1933
was already on the sift but liked this blue/synth mash-up better..

This mashy makes Al sound even more imbecilic than ever!!!

oh yeah, that Danzig vs Shakira mashy was some funny shit, blankfist......her hipsis are gonna really give her problems when she's like 35.....that lower lumbar actions' gonna put her on her back.....mmmmmmm, Shakira on Baaaaack!!!

Betty works with any mashy-mash......
http://www.videosift.com/video/Betty-Boop-feat-Ray-Charles-Lets-Go-Get-Stoned

nice mashy mashy, gets all smarmy t'ward the end and drags, overall fun to watch.....
"We've done it before, and we can do it again...la la la la la la la....

...sounds like a maroon, with a puter, and a tv, made a shitty mashy...laime!

....reminds me of a pixel-generator, raising a human, with a program written by a part-timer,
at Radio Shack™...an' its got a mashy beat...

....don't know why, but these gaming-mashies always get the, "yes that crazy shit goes good with and needs a soundtrack" reaction outta' me....methinks that's why the GTA games are so popular...follow me here ya' gamers from the wayback machine.....

exampl0-e:-listening to "Four Little Diamond's, whilst jacking a short an' blowin' up a heliocoptre, is an imprint, unto itself.....an a'course, the zzzzz (and soon to be convicts) generation, loves to roll wiff' dem Hip-Hop, yo, while theys' eatin' fried foods, liftin' out, and snappin' up territory....marketing, oh and graphics, too....

....and then, I woke up one day all the street signs were written in mongolian......

That narration sounded bong-induced...the mashy ees cool.

the inability to process information kills people...and so do pep rallys, national sporting events, and the current political and economic models on the planet.....