John Cena

Kevin Federline was left writhing in agony after being beaten up by a professional wrestler.The fledgling rapper, the husband of Britney Spears, appeared at a taping of the hit wrestling show 'Monday Night Raw' at the Staples Center, in Los Angeles, at the weekend.Kevin was introduced as the "A-list" friend of villainous wrestler Johnny Nitro as he made his way down to the ring. As he walked down the ramp, the crowd booed and jeered the former backup dancer. He then grabbed a microphone as he entered the ring and said: "Same people who are booing me now buy my picture when it's on the cover of magazines."Kevin then further taunted the crowd, saying: "Y'all want to hear my rap? Well, you're going to have to wait until my record drops in October."However, the budding rap star was interrupted by WWE champion John Cena who launched a tirade of insults at Kevin, and had fans in hysterics when he said: "You're less talented than Paris Hilton!"The insult prompted K-Fed to lose his cool with the muscle-bound wrestler and he challenged him to a fight, but the fool hardy star was soon put in his place by Cena who picked him above his head and slammed him into the canvas. A dazed Kevin eventually made his way backstage to recover from his unusual altercation. The stunt, believed to have been arranged to promote K-Fed's upcoming album 'Playing With Fire', was witnessed by a host of celebrities, including Jackass stars Steve-O and Chris Pontius, ageing rock band ZZ Top and former Backstreet Boys singer Nick Carter, who was accompanied by his younger brother Aaron.