Sean “P. Diddy” Combs had a busy Tuesday night. First, he recited the Top 10 List on “Late Show with David Letterman” in midtown, then he headed downtown, to the Manhattan movie premiere of the mob comedy “Made,” in which he makes his acting debut. He plays Ruiz, a (what else?) wealthy, cool guy, always outfitted in fine clothes and sparkling diamonds. Arriving at the premiere an hour late, Combs was sporting the same diamond earrings that he wears onscreen, as well as a blue button-down shirt and tinted sunglasses. Referring to his part in the film, the rap mogul, 31, told PEOPLE: “I have a small but substantial role.” (The actual stars of the picture are Jon Favreau and Vince Vaughn.) As a native New Yorker, Combs said he took on the Big Apple-based role for the sake of his costars. “I just wanted to open up the city to them and let them know how we do it here in New York,” said Combs. “I love New York. Shout out to all the New Yorkers.” As for the Letterman taping, Combs listed the Top 10 things you’ll never hear on a Sean Combs CD. No. 1: “Is my a– too big?”