Justin Bieber sounds unrecognisable singing Happy Birthday to Twitter

Twitter turned 10-years-old this week and to celebrate the social media site sent various celebrities messages.

The main Twitter account sent #LoveTwitter messages to celebs including Justin Bieber, Kim Kardashian and Taylor Swift .

And Biebs decided to send back the love by singing happy birthday. Sounding very un-Bieber indeed…

Amazing!

• Justin Bieber
• The Buzz
• Twitter