The Epic Rap Battles Of History series? Great stuff if you like comedic parodies. Later, QD.

Part I - John Lennon vs. Bill O'Reilly
http://www.youtube.com/watch?v=YHRxv...feature=relmfu

Part II - Darth Vader vs. Adolph Hitler
http://www.youtube.com/watch?v=AFA-r...feature=relmfu

Part III - Abe Lincoln vs. Chuck Norris
http://www.youtube.com/watch?v=zj2Zf...feature=fvwrel

Part IV - Sarah Palin vs. Lady Gaga
http://www.youtube.com/watch?v=mhTd4...feature=relmfu

Part V - Hulk Hogan vs. Kim Jong-il
http://www.youtube.com/watch?v=7rE0-...feature=relmfu

Part VI - Justin Bieber vs. Beethoven
http://www.youtube.com/watch?v=UcTLJ...feature=relmfu

Part VII - Einstein vs Stephen Hawking
http://www.youtube.com/watch?v=zn7-f...feature=relmfu

Part VIII - Genghis Khan vs Easter Bunny
http://www.youtube.com/watch?v=WA4tL...feature=relmfu

Part IX - Napoleon vs Napoleon
http://www.youtube.com/watch?v=AeNYD...feature=relmfu

Part X - Billy Mays vs Ben Franklin
http://www.youtube.com/watch?v=TAaE7...feature=relmfu

Part XI - Gandalf vs Dumbledore
http://www.youtube.com/watch?v=ZIMoQHpvFQQ

Part XII - Dr. Seuss vs Shakespeare
http://www.youtube.com/user/nicepeter