Sylvester Stallone might still be a 98-pound weakling if he didn't have kickass songs to guide him into the ring. And these anthems didn't just win fights, they left a mark on pop culture. James Brown delivered a rousing shout-along chorus on "Living in America." John Cafferty offered sleek arena rock with "Hearts on Fire." And half the sporting events since the early '80s would've been a lot quieter without Survivor's "Eye of the Tiger,” whose opening riffs practically demand that you raise your fists.