Blake Shelton has a brand-new job that starts later this month: He will be a vocal coach on NBC's new music competition show, 'The Voice.' One of Shelton's co-stars is Maroon 5 frontman Adam Levine, who was in for a a surprise upon meeting Shelton.

"I wasn’t expecting you to be funny," Levine tells Access Hollywood. "I was expecting like a really earnest, like straight up country guy. I wasn’t expecting this like, subversive punk rock man."

Many country fans have been long acquainted with Shelton's PG-13 tweets, but soon the rest of the world will know just how funny and quick-witted the 'Honey Bee' singer really is. Shelton admits, "I don’t think I can incorporate the tweet behavior of my personality into this show because there is, you know, some language barriers I would say."

Referring to the "language issues" of his co-coach Levine, Shelton says, "Adam is still working on that. He’ll drop a bomb." Quick to play off the soon-to-be Mr. Miranda Lambert, Levine agrees, "I’ll drop some F's, some S’s."

'The Voice' debuts on NBC on April 26. It will be hosted by Carson Daly and will include a judging panel made up of Shelton, Levine, Christina Aguilera and Cee Lo Green.