The Darkness frontman - who has been clean and sober of the drug for six years - admits he does still like to party but does it in a much more restrained way now than how he used to.
He said: "I don`t see us as a heavy metal or glam band. We try different things to suit specific songs. There`s more energy in the band now.
"If anything, we have to hold back now because the shows are so physical. We still have parties on the road, but now they`re the kind of party a fiveyear old might have."
The group - made up of Justin, his brother Dan Hawkins, Ed Graham and Frankie Poullain - are soon due to support Lady Gaga on the UK leg of her `Born This Way` tour and Justin admits they were very keen to sign up when she asked.
He told the Daily Mail newspaper: "As soon as she asked us, we said yes. She is the greatest pop star of the 21st century. She`s always in character. Her persona is in interviews can be weird, but in a great way."