I just finished doing a rap-along to Tupac's "Changes" with some ad-libbing on the chorus. I made another video for YouTube with it, and will post the link when it's up.
edit:
http://www.youtube.com/watch?v=mUyvRu6IFZw
My mic is so awful, so there's a lot of points where my voice gets interrupted by pops/clicks. I tried doing some editing to remove them, but could only minimize them. Ah well, not taking the time to do this over again!
I mess up at the break and 3rd verse, and you can hear me almost start laughing at one of the mistakes. heh. I held it together!
Once again, no shame obv.