Former Libertines and Babyshambles frontman Pete Doherty says he's continuing to struggle in his battle to get clean. In a new interview with the Guardian, the vocalist says he found himself once again using drugs on the set of the film 'Confession of a Child of the Century.'

Doherty says, "I couldn't hide [the drug use] from [the film's director]. She didn't really care. It was a question of how quickly I can find a vein and then let's get on with it."

The singer says he's knows it's wrong, but has a hard time denying himself. He adds, "It's poison but it's also medicine. When you're in that state, you can't function unless you have your fix." Doherty says he's trying sobriety at the moment, but adds, "I am struggling, to be honest."

The singer also spoke about his time behind bars last year, when he was serving time for one of his drug offenses. He's not keen on returning, and explains, "It's horrible, horrible. There are lots of aggressive, money-oriented, very masculine people, but at the same time, there is really nasty homoerotic violence. It's not the place to be if you're a freethinking man."

Doherty ran into a little trouble with the prison guards, who viewed him as "a scumbag drug addict." He says they didn't care for it when they read his fan mail from kids that admired his music and lyrics. He recalls, "They put me in with the nastiest, most horrible bloke you could imagine. But it turned out he was a big music fan and he didn't like bullies."

The singer says he's currently in the process of recording a new studio album, and he revealed seven new song titles to NME earlier in the week. They include: 'Bird Cage,' 'Down for the Outing,' 'Siberian Fur,' 'Nothing Comes to Nothing,' 'Shine a Light on Your Misery,' 'Ba Ba Ba,' and 'Dust on the Road.'