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1 March 2013, 16:37
The 'Boyfriend' star also had a message from Ke$ha, who shares the same birthday as him.
The likes of One Direction star Niall Horan and will.i.am are among some of the first stars to send their birthday wishes to Justin Bieber.
The Canadian pop star turns 19 years old today (1st March) and is spending his birthday in the UK, where he is expected to have a lavish celebration this evening in central London with friends.
"Big happy birthday @justinbieber, have a good day bro!" Niall tweeted to the worldwide superstar.
"I wanna send a Happy Birthday shout out to mu lil bro @JustinBieber," Will.i.am also posted.
The 'Scream & Shout' rapper and Justin recently collaborated on a song called 'You And Me' for his 2013 album '#willpower'.
Fellow pop star Ke$ha has also posted a special Twitter message to the Canadian star, as the two both share the same birthday.
"Happy bday @justinbieber! u stole my bday!" Ke$ha cheekily posted.
Check out a picture of Justin Bieber out celebrating his birthday after his 'Believe' tour concert last night below (Credit: Splash):
Last night the 'As Long As You Love Me' star brought his 'Believe' world tour to Birmingham, and headed straight back to London after the show for a night out with friends that ended at a kebab shop at around 6am.
Justin Bieber's 'Believe' UK tour will next pick up this Saturday (2nd March) with a show at the Capital FM Arena in Nottingham.