JUSTIN Timberlake is starting to feel his age The 30-year-old pop hunk has Olivia Wilde, 27, playing his mother in futuristic thriller In Time but thats not why hes feeling old. I got to tell you, with The Social Network and this film, they make me feel old, says Justin. All the cast members are younger than me. Thats a new experience for me. Justin recently insisted that he does not like to be careless with his cash and rarely shops, and doesnt think money can buy happiness. I will say that Im pretty frugal. Ill probably shop for clothes for myself once a year, and that will last me for the rest of the year, he said. What was it that Prince said, 'Money cant buy you happiness, but it can help pay for the pursuit. GN