To be honest I don't like rap. During my undergrad studies I went to university with my brother and he'd play all these contemporary rap artists and it drove me insane. Fortunately afterwords he let us listen to 5FM instead.
Even though rap is most likely my least liked genre, I love Rapper's Delight by Sugarhill Gang. This is the best rap song on the planet. I can't help but sing along to some of the lyrics. Every body together now: