A man who has devoted his life to crafting perfect jokes and has left a trail of laughter in his wake, Jimmy distils everything we love to laugh at and be shocked by, into one unparalleled night of entertainment.
The British Comedy Award winner has performed nine sell-out tours, playing nearly 2,000 shows to over two million people across four continents.
During his stint with MTV Europe, which he joined in 2000, John met many of his musical idols including David Bowie, Nile Rodgers and Dave Grohl of the Foo Fighters.
"I have worked with David Bowie a number of times and Prince which was really exciting as he is so reclusive," he says.
The station's Newtownards studios are based on the Kiltonga industrial estate.
All but one of Cool FM's programming is locally presented and produced from its Newtownards studios.
"There is such a vibrant music community in Nashville and I meet with musicians and producers I have gotten to know during my career.
"Just because artists like Ed Sheeran and Sam Smith are commercially successful doesn't mean they're not credible in musical terms - sure half of Belfast will be at Take That in May.
If something is good it is good." John began his radio career at Cool FM over 20 years ago before landing the MTV gig.
His Twitter feed is awash with musical references and pictures, including one of a Fender Stratocaster guitar customised by Johnny Marr for sale on e Bay.
There is another shot of John with legendary music producer Nile Rodgers at last year's Belsonic as well as some snaps of himself laying down self-penned tracks at a Nashville recording studio.