Surprise, surprise.

Ultimate Fighting Championship (UFC) women's bantamweight champion Ronda Rousey is siding with Nick Diaz against Georges St. Pierre in the main event of UFC 158: "St. Pierre vs. Diaz" this Saturday night (March 16, 2013) in Montreal, Quebec, Canada.

Rousey, or as UFC President Dana White has called her in the past, "a Diaz brother on the inside," is a good friend and training partner of the Stockton slugger, and that "Rowdy" is rooting for him in the welterweight championship contest set to go down at the Bell Centre, is far from shocking.

The Olympian forecasted the highly-anticipated bout in a recent interview with "Showdown" Joe Ferraro of Sportsnet.

Her words:

"I don't know [how the fight will play out], it's such -- one of the things that makes this card so interesting is I don't know how it's going to go. I know that GSP's a lot more riled up for this fight, and I hope to see him returning to that -- the actual ‘Rush' St. Pierre that I haven't seen since that loss to Matt Serra. You know, I used to be a really big GSP fan, but I have seen the way that his fights are kind of changing over the years and he has obviously not been very supportive of women fighters and Nick has always been one of my favorite fighters, I've always admired his fighting style since I even started doing MMA, so I hope he wins this."

While Rousey makes her bias towards Diaz clear, the most interesting part of her fight preview is noting that St. Pierre has lost her as a dedicated fan due to his increasingly conservative fight style. Moreover, it's obvious Rousey still has some sour grapes towards the French-Canadian due to his past comments where he stated he has a "hard time" watching women's mixed martial arts (MMA).

When asked for an exact prediction on the fight outcome, Rousey, not before taking one final shot at St. Pierre, went with Diaz, but did not mention how the 29-year-old will capture the gold.

"I think he can and I think he will, I want this to be a really good fight and I hope GSP comes out to fight and not win a couple rounds and if that happens it will be one of the most memorable fight cards ever."

MMAmania.com will provide LIVE round-by-round, blow-by-blow coverage of the entire card on fight night (Sat., March 16, 2013), starting with the Facebook "Prelims," which are scheduled to begin at 6:30 p.m. ET, as well as the main card, which is slated to air at 10 p.m. ET on PPV.

For the latest UFC 158 news and notes check out our complete event archive right here. To check out the latest "St. Pierre vs. Diaz" fight card and rumors click here.