Justin Bieber has praised his fans for helping to put a smile back on his face after he had the 'worst birthday' on Friday (01.03.13).The 'Nothing Like Us' singer - who was forced to cut short his birthday bash in a London nightclub on Friday (01.03.13) because his good pal Jaden Smith was underage - has thanked his supporters for helping to put a smile back on his face.The 19-year-old Canadian popstar returned to Twitter for the first time after his disappointing celebration on Saturday (02.03.13) and expressed his appreciation for all the messages of encouragement from his fans.He wrote: "I see and saw all the posts from around the world. U got me smiling. Love u. Thank u. (sic)"The heartthrob also retweeted dozens of messages from his diehard followers, as well as a post from his manager and good friend Scooter Braun, who wrote: "Life is a roller coaster. Just know when u dip low it is only to build excitement as u will fly high again. Enjoy the journey."Justin was devastated after his entourage had a confrontation with security staff that led to them having to leave his £10,000 circus themed party in Cirque du Soir nightclub after just 15 minutes on Friday night because they refused to let 14-year-old Jaden - who is the son of Hollywood power couple Will Smith and Jada Pinkett-Smith - into the event.A source previously said: "There was never any mention of Jaden being there, so when he showed up, it caused problems. They could have stayed if Jaden left, but Justin wanted to be loyal to his good friend."The group were forced to celebrate at a nearby McDonald's before returning to posh hotel, The Langham, where he is staying during his time in the UK.View the gallery for pictures of Justin Bieber's new love interest, as well as other related pictures.