By Hannah Roberts & Ayaan Ali Billie Piper says her teenage years felt “like heaven” while revealing she used to smoke cigarettes with the Spice Girls at the of 15. The actress – who is best known for her playing Rose Tyler in Doctor Who and Hannah Baxter in Secret Diary Of A Call Girl – launched to fame in the late 1990s as a teenage pop star, at which point the girl group had achieved global success. Speaking on The Jonathan Ross Show on Friday night, the Because We Want To singer, 41, and Spice Girl Mel B reflected on when they had appeared on the music chart show Top Of The Pops and smoked…