Tommy Hilfiger owns up to 50 Warhol artworks, by his count. “I love American icons,” he tells Alina Cho on her CNN show, “Fashion: Backstage Pass,” screened today. Some of his Warhols: Liz Taylor, Grace Kelly, Muhammad Ali, Liza Minnelli, John Wayne, Mickey Mouse. He even does an impression of Warhol: “Andy was a very nervous type. When he spoke, it was like, one or two words at a time. One time, I asked Andy, ‘Why do you do what you do?’ He said, ‘Because I like it.’ That was it.”