Mariah Carey and her husband Nick Cannon hit the town in NYC last night to attend the 2012 Project Canvas Exhibition and Art Gala. The event was held at the city's Opera Gallery and was designed to raise money for art programs in NYC schools. Mariah was on hand to support Nick, who hosted. She tweeted, "At Nick's launch for project canvas. The shoes. . . Come on. . . A winner!" It was Nick and Mariah's latest special night. They were just in Paris to renew their vows in honor of their fourth wedding anniversary. Their children went along for the European excursion as well. Moroccan and Monroe Cannon's first birthday was on April 30, as Mariah welcomed them last year on her and Nick's third anniversary.