Justin Bieber has revealed he is "trying to be better" after photographs of him at a recent party with a suspicious looking cigarette surfaced.

US website TMZ obtained images of the Canadian superstar which were reportedly taken on January 2nd - a day after a photographer tragically died while chasing down Bieber's car.

The photographs show Bieber holding a suspicious looking cigarette - leading many people to speculate whether or not he was smoking marijuana at the party.

Bieber - who has not commented on the controversial claims - took to Twitter today to address his fans following his difficult week: ''Everyday growing and learning. Trying to be better. U get knocked down, u get up. I see all of u. I hear all of u. I never want to let any of you down. I love u.

He added: ''I'm ready. We are ready. See u all tomorrow and everyday after that. Back on tour tomorrow. Ready to see u all smile. Time to do what I'm supposed to be doing. Performing (sic).''

Earlier this week Bieber issued a statement about the incident involving the photographer, calling for a change in law to protect celebrities and photographers. The 'Believe' star said:

"While I was not present nor directly involved with this tragic accident, my thoughts and prayers are with the family of the victim."

He continued: "Hopefully this tragedy will finally inspire meaningful legislation and whatever other necessary steps to protect the lives and safety of celebrities, police officers, innocent public bystanders, and the photographers themselves."

Watch a recent interview with Justin Bieber here: