In the latest segment of 'Drop the Mic' on 'The Late Late Show,' nothing seemed to be off limits during this heated rap battle between James Corden and Ashton Kutcher. From taking swings at each other's careers to hard hits about their marriages and fashion sense, no one was safe in this rap battle boxing ring.

"You do great charity work year after year," Corden said to Kutcher. "Why don't you save something from dying? Why don't you start with your career?" The audience erupted with applause as the host mocked the actor while trying to restart his broken heart.

Quick on the response, Kutcher said, "My career's been doing fine ever since the 70s, your job's an Uber driver for real celebrities."

Corden called for another round saying, "You joined Two and a Half Men when producers had a beef, it's the only time people thought, man I miss Charlie Sheen. You invested all your money in technology and apps. Hell I'd do the same if I knew I couldn't act."

With a rap battle this hotly contested, the two needed a professional opinion to settle the match. Rapper Diddy came out to call James Corden the winner. 

The beat was fast and the insults were scathing, check out the full segment of 'Drop the Mic' on YouTube here.