From one icon to another -- that's Christina Aguilera posing in front of Andy Warhol's silkscreen portraits of Marilyn Monroe last Monday. Aguilera, in Pittsburgh to visit her family, was asked to pick a location where she could be interviewed for the September cover of Jane magazine. She chose The Andy Warhol Museum, which she toured with Esther Haynes, the senior editor at Jane. Since the museum is closed to mere mortals on Monday, she managed to walk and chat without interruption.