I've compiled a list of faves of remixes from using Songsmith. If you've got one that I don't have, feel free to add it! If you don't know, Microsoft Songsmith lets you feed audio vocals into the computer and it will auto-generate music to go with it. As you'll see with these videos, they don't always work.
Songsmith doesn't suck, you just need to know how to use it.
Eye Of The Tiger - Survivor: I don't think Rocky would approve!
Toxic - Britney Spears: Better than the original?
Drop It Like It's Hot - Snoop Dogg: No comment. No comment at all.
Echoplex - Nine Inch Nails: Songsmith just ruined the best song from The Slip.
Finally, Songsmith is used upon its own horrible commercial.
Don't forget to comment on each other's videos!

Horrible version of "Buddy Holly" by Weezer..

Songsmith version of Johnny Cash's Hurt:
[url=]http://www.youtube.com/watch?v=Ci1K9Zcwvy4&feature=related[/url]
Dunno whether to laugh or cry... :|

Blackened by Metallica
http://www.youtube.com/watch?v=Jm2bRcNueu0&feature=related
Crazy Train by Ozzy
http://youtube.com/watch?v=VFZvLprEIpw
The Songsmith Rickroll
http://www.youtube.com/watch?v=nd2oDClUw20

http://www.youtube.com/watch?v=UlCWo1qdTdE White Wedding, Billy Idol. This is my favourite one.

And (having never heard the original) it kinda works. It's not a perfect fit, but it at least seems to match in key and rhythm. Still, that's one out of ten and even if it works, I'm still not sure what we need it for.

http://www.youtube.com/watch?v=AofzLsvTsM0 (the original)
And yeah, my favourite ones are the ones that 'work' because they inevitably sound the cheesiest. :]

I always knew Metallica were a bunch of new wave pansies hiding behind a bass.
[url=]http://www.youtube.com/watch?v=ie2cZFbv2l8&feature=related[/url]

I thought this was pretty creative, Songsmith fed with Stock Charts:
http://www.youtube.com/watch?v=2-BZfFakpzc