EDIT
Ok, so predictably the link on YouTube to Hugh Laurie's "Protest Song" from SNL didn't last long... but - he DOES have it on his web page. While it probably won't be there forever, it's definitely way more stable (and presumably, way more legal) than the YouTube version, so check it out, on his videos page. Under "Saturday Night Live" clips, click "All We Gotta Do Is". And wait for it to load...
You need Quicktime, and it's pretty high quality, which means it's a longer download, but IMO, worth the wait for a laugh.