5: Yoda (Dare to be Stupid, 1985) - A parody of Lola by The Kinks. Weird Al makes references to Star Wars in several of his songs and has more than one song exclusively about the franchise, but in my opinion, this one is the best. Memorable lyric (Yoda to Luke Skywalker): "I know Darth Vader's really got you annoyed, but remember if you kill him then you'll be unemployed..."
4: Smells Like Nirvana (Off the Deep End, 1992) - A parody of Smells Like Teen Spirit by Nirvana. The best parody video he's ever made, and a great parody capturing both the angst/nihilism of Nirvana and the general goofiness of Weird Al. It's clever and funny, and makes fun of Kurt Cobain's often incoherent singing style.
3: White and Nerdy (Straight Outta Lynwood, 2006) - A parody of Ridin' by Chamillionaire. If you need proof that he studies his subjects, look no further than this rap song about racial profiling and police brutality which Weird Al turns into a song about being a geek. Can Weird Al rap? Let's ask Chamillionaire himself: "He's spittin' just like [rapper] Krayzie Bone on the second verse ... The way Krayzie is harmonizing, he does the same thing. It surprised me. I didn't know he could rap like that."
1: Fat (Even Worse, 1988) - A parody of Bad by Michael Jackson. Weird Al did an amazing parody of Beat It, and followed it up with this even better parody of Bad. It's a perfect parody wherein Weird Al turns into an grossly obese man leading a gang of fat guys while singing about being fat. Yeah, okay, it doesn't sound like much, but just check it out.
So this list excludes all of Weird Al's original (non-parody) work. It was also crazy difficult to narrow down--there are so many good choices. Where available, I'm linking the song names to the videos as well, since his video parodies are often right-on as well (for example, in Smells Like Nirvana, he got the same actor to play the janitor that Nirvana had in their video). Here's a link to a side-by-side comparison someone did of Weird Al's versus the Michael Jackson original, so you can see just how good Weird Al's is. What's your favorite Weird Al parody? Let me know in the comments below. And please email, share, or tweet this post to your friends!