The pop star, who has detailed his past drug abuse in his new memoirs Facing the Music and Living to Talk About It, insists he is "completely drug-free", but he still likes the occasional drink - something he knows he should stay away from.
He tells The Hollywood Reporter, "I have had occasional drinks at times, and it's something that I struggle with because I'm not perfect. But, at the same time, I enjoy being clean and sober more. Alcoholism is definitely a struggle for me. I'm taking it one day at a time, working on myself, and I'm winning the battle."
However, Carter admits he finds it difficult to be around other drinkers in clubs and at parties: "I think it's all about learning from those experiences and continuing therapy, continuing to work on the reasons why someone turns to alcohol. That's why I wrote this book - this is just the beginning, the first chapter, really.
"I'm 33 years old, I'm still living life... but it's still a work in progress. I haven't figured it out - I have issues, I definitely have problems, but I start with acknowledging that I do have a problem and face it head on."