(contactmusic.com ) - Pop star Britney Spears has ended speculation she is pregnant after she was snapped smoking cigarettes.The Toxic hitmaker fuelled rumours she was expecting her third child after she was recently photographed with a round tummy.But the singer ended speculation after she was snapped puffing on a cigarette. She has also been enjoying vigorous sessions at her gym.Spears has two sons with ex-husband Kevin Federline, Sean Preston , two, and Jayden James , one.