'I've over here with the fastest man alive!' Excited Justin Bieber Snapchats with Usain Bolt at party... before turning away trio of beauties at hotel

He is one of the most famous male solo singers in the world with a string of hits under his belt, not to mention his 90 million Twitter followers.

But even Justin Bieber got excited at meeting the world's fastest man - Usain Bolt - on Monday night.

The 22-year-old singer Snapchatted an encounter with the sprinter, telling fans: 'I'm over here with the fastest man alive. So watch out!'

See video after the cut...

The Jamaican sprinter then appears in the video to ask fans: 'are you ready for this?' before poking his tongue out in the post, seemingly sent from Usain's phone.

And it seemed Usain was equally as enamoured with Justin, posting an Instagram of the pair of them posing together.

'Good meeting you. Great guy right here,' Justin wrote on his Twitter page, linking to the athlete's post.

The singer looked a lot more fresh faced and lively at the bash than he did when emerging several hours later.

At around 4am, the Canadian singer looked a little worse for wear, pulling a variety of faces as he emerged bleary eyed from the venue.

And he looked a lot less dapper in a pair of spectacles and a black and white woolly hat.

Perhaps he was too tired to continue the party after a trio of leggy beauties reportedly arrived to see him at his hotel.

However, they were unable to get through the gate when their entrance was barred by security.

The trio all sported tiny dresses and warm furry jackets and were spotted huddled together outside the gate where they were described as 'making numerous calls' to try to get in.