Bieber reaches landmark birthday
Justin Bieber has finally turned 18 - and marked the occasion by revealing the name of his new single - Boyfriend.
The teenager visited The Ellen DeGeneres Show to confirm the news his fans had been waiting for.
As the countdown to the big day arrived, the Never Say Never star wrote on Twitter: "Almost legal". And he added: "Can't believe I'm almost 18. Partytime."
He told his almost 18 million followers: "So blessed. So moved. So grateful. Can't believe this is my life. Never going to take it for granted. Always going to give back. Thank you."
Cheryl Cole was among the celebrities wishing him happy birthday, writing: "I hope you have an amazing 18th that you never forget... kisses"
Explaining the reason behind the name of the song, which he co-wrote, he told Ellen: "Basically the song is I'm talking to this girl, 'If I was your boyfriend, I would never let you go'."
And the Baby singer said his mum was still his role model.