Jimmy Fallon feels "lightning" when he works with Justin Timberlake.

The 37-year-old American comedian and late night talk show host and Justin were both named one of GQ magazine's men of the year.

On the cover image of this special issue, Jimmy is comically grabbing Justin's groin while the singer has his hands behind his back.

Jimmy reveals that the photo is not as controversial as it appears.

"There's no actual contactno physical contact," Jimmy told E! Online at last night's GQ Men of the Year party. "It's like one of those round machines at Sharper Image where lightning shoots out and up to your hands. There was no actual contact, but there was electricity."

The cover image pose was not preplanned. The chemistry between Jimmy and Justin during the shoot was so good the pair were able to get really creative with one another.

"Anytime you get to shoot with Justin Timberlake, it's going to be fun," Jimmy gushed. "He's full of energy. It's actually the best photo shoot I've ever done."

Jimmy did not expect to be included as one of GQ's men of the year. The honour came out of the blue.

"It's the craziest thing. Twenty people call and you're on a conference call and I'm like, 'Is my career over? Is there a scandal? Am I having a baby?' But they go, 'GQ wants you as a man of the year. As a comedian you don't think about these things. You don't have that kind of goal."