B.o.B visited the 'Tonight Show With Jay Leno' on Tuesday, but instead of promoting one of the songs from his brand-new 'Strange Clouds' album, the rapper invited veteran rock band O.A.R. to perform 'Champions,' their collaboration for Duracell's 2012 Olympics Games campaign.

The inspiring track featured O.A.R. repeating the hook, "We're all champions," while B.o.B rapped, "It’s all that I’ve ever know, it’s all that I’ve ever seen / I came here with nothing but I’ma leave with a legacy / A brand new and better me, belief is the recipe / And ain’t no second-guessing when you're thinking successfully."

'Champions' is the theme song for Duracell’s 'Rely On Copper To Go for the Gold' program, which encourages Olympic viewers from around the world to support their country's athletes by posting messages on Facebook and Twitter.

O.A.R. actually began writing the track more than a year ago, and when Duracell contacted them for an Olympic theme. They completed the song and enlisted B.o.B to take the song to the next level.

B.o.B told Yahoo Canada, "I think the song is very synonymous with challenges that many people face in life even beyond the field, beyond the court and beyond the sports. It's the same place you have to dig from and challenge from when you're an athlete or at an Olympian level. This is the best the world has to offer."

Watch B.o.B and O.A.R. Perform 'Champions' on 'The Tonight Show'