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O.A.R. and B.o.B. present their collaborative song and video "Champions," a rock-meets-hip-hop teaming for Duracell's "Rely On Copper To Go For The Gold" program that supports the 2012 London Olympic Games.

The "Rely On Copper" initiative gives Olympic fans a way to celebrate athletes competing oversees. Users can use Duracell's Virtual Stadium on Facebook and Twitter to send encouragement via videos, pictures and texts messages.

O.A.R. lead singer Marc Roberge said the band had been working on the song "Champions" with Diji Parq for about a year but had not completed it. When they received the call from Duracell to make an anthemic song for the Olympics they immediately revisited this record.

"It just seemed so perfect for the message, the brand and the Olympics," he said. Roberge added that he requested that B.o.B. guest on the song. "This is an artist that is not just a rapper, not just a musician, not just a singer or songwriter, he's done it all," Roberge said about the Atlanta rapper.