Sporting some newly fashioned cornrows on his head, *NSYNC star Justin Timberlake, 19, picked up his high school diploma last Friday in Memphis, Tenn., during the group’s concert there. TV’s “Access Hollywood” recorded the homecoming of the big man on campus, who was happy to learn that this year’s yearbook is dedicated to him. On stage, Timberlake accepted the sheepskin with a graduation robe draped over his shoulders. During a tour of his old school, he noted that the place looked smaller to him since he’s been away from it. *NSYNC’s “No Strings Attached” remains atop Billboard’s album chart.