He may have only been around full-time for two years, but in that time Brock Lesnar made himself a household name, and his simple but effective theme a recognizable sound to people across the world. Before he was a UFC pay-per-view juggernaut, Lesnar ran roughshod over the WWE from 2002 to 2004. During that time he posted victories over The Rock, Hulk Hogan, Kurt Angle, The Undertaker, Ric Flair and tons of others on his way to gargantuan levels of superstardom. When his entrance music "Next Big Thing" hits, you know business is about to pick up. A quick shrieking of a guitar, followed by a much slower paced beat sets the tone for the things Lesnar is on his way to do within the ring. Need any more proof that his simple, yet lasting song stuck with audiences? See his 2012 return, 8 years after his last WWE appearance, which saw the arena come unglued.