Will sing, just add vodka. If you, like Jason Derulo, love to bust out a smooth tune or two after you've had a few drinks, you need to add this shirt to your wardrobe. It would also make the perfect gift for your karaoke-loving BFF. Bright white screen print on a black t-shirt, cut and sewn sweatshop-free by Midwest-based RAYGUN. 100% pre-shrunk cotton.