Both have claim to a piece of welterweight gold, and only one will walk out champion, but who will it be?
GSP has an impressive 22-2 record, including six-straight title defenses over such names as B.J. Penn, Josh Koscheck, Jake Shields, Dan Hardy, Thiago Alves and Jon Fitch.
"Condit has no title defenses, a controversial victory over Nick Diaz and his stance on foreign policy," says this hilarious video.
St. Pierre hasn't lost a fight in over five years, dating back to Matt Serra's upset victory at UFC 69.
He dresses in suits, deals with the public well and is a name known worldwide.
GSP is a dynamic fighter, whose stance on fighting is to get to the ground and utilize his jiu-jitsu game for a submission.
GSP is no secret to having the interim title, but publicly said that it wasn't the real thing. He grabbed "the real thing" at UFC 83 in his native Montreal, Quebec in April 2008.
Now, he is in the role of having a disputed world championship to defend.
GSP wants your votes for UFC Welterweight Champion. Will you give him his support in the upcoming election?
Wait, I mean fight. Sorry, the video is getting me in the spirit to cast my vote...and I'm Canadian!
Anyway, will GSP emerge as champion? What do you think?
Click here for Carlos Condit's arguments for being the UFC Welterweight Champion.