His wife may be the world's biggest star, but Nick Cannon is stepping out of her shadow. Mr. Mariah Carey, who begins hosting the fourth season of America's Got Talent this summer, scouted the Windy City to pick the country's next generation of superstars for the NBC hit and later deejayed at Chicago's The Underground to celebrate owner Billy Dec's new blog billydec.com on March 5. "I'm really excited. It is a comic's dream to be able to interact with people who are doing all kinds of quirky things," the actor/rapper/comedian told In Touch at the soiree about his new hosting gig. Though he had a blast sipping Grey Goose cocktails with pals, the star's heart was back in New York with beau Mariah. "I miss my wife. I've been gone way too long!" he added. Nick played Mariah's single "Fantasy" for the crowd, and then took off due to an early-morning flight to reunite with his better half.