The Greatest Sia feat. Kendrick Lamar
Justin Bieber has apologised for giving the paps the middle finger.
The incident happened as Justin was celebrating his 17th birthday at LA's Maggiano restaurant.
Paps surrounded his car and Justin stuck his middle finger up at the photographers.
He Tweeted: 'Had a great bday and at the end of the night we got surrounded by paps and I reacted in a way I know better. im sorry'