Singer Lily Allen has no idea how many brothers and sisters she has, because her actor dad can never agree on the number of children he's fathered. The Smile singer admits it's tough keeping track of Trainspotting star Keith Allen's family tree. She tells website, "My dad lies about it. He's like, `OK, it's eight.' And I'm like, `We know it's 12.' "There are a few years before he met my mum that are unaccounted for, but law of averages would say he had five (kids then)."