Playboy founder Hugh Hefner tells Us Weekly he’s interested in adding the pop singer to his stable of blonde girlfriends after her quickly annulled marriage over the weekend to childhood pal Jason Alexander. “Britney would make a great girlfriend,” 77-year-old Hef said. “Picasso had his pink period and his blue period. I am in my blonde period right now. I think it’s related to those early movies that had such a great influence on me when I was a kid.” He’s also interested in the singer posing in his magazine.