Tough guys: Justin Bieber joins 50 Cent and Lil Wayne as guests of honour as Floyd Mayweather beats Miguel Cotto

Justin Bieber cemented his status as the world's greatest teenager last night.

Clearly being a platinum selling pop star with over 21 million Twitter followers isn't enough for the young Canadian.
The Boyfriend singer was the first person to congratulate Floyd Mayweather Jr as the pint sized boxer defeated Miguel Cotto, at the MGM Grand Garden Arena, in Las Vegas

Best friends: Justin Bieber celebrates with Floyd Mayweather Jr after the boxer defeated Miguel Cotto, last night, in Las Vegas
Justin was Floyd's guest of honour at the big fight, even though other notable stars included rappers 50 Cent and Lil Wayne.
The unlikely friendship between Bieber and Mayweather has become so close that the 18-year-old was given unrivalled access to the undefeated boxer.
The pop star joined Floyd in the dressing room before the fight and was given great seats after escorting the champ into the ring.

Diamonds are forever: Rapper Lil Wayne, second from left, shows off his jewel encrusted teeth as he smiles

Earlier in the day, Justin tweeted his new best friend and said: 'cinco de mayo.... #MayweatherCotto yeah @FloydMayweather today is a BIG day.'
The bromance continued when the champion athlete sent a message back to the Never Say Never singer.
Floyd said: '@justinbieber keep up the great work and thanks for the support #TheMoneyTeam. Enjoy the fight.'

How sweet: Boxer Floyd Mayweather Jr delicately pats Justin Bieber's head after he won the fight
Bieber was dressed all in black and wore a leather jacket with a matching T-shirt and jeans and a large gold pendant.
The lucky teen also got his hands on two of Mayweather's belts and was keen to show off his friend's credentials as he held them both up for the camera with a huge grin on his face.
Floyd added the WBA Super World light-middleweight title to his supreme career roster with a battling unanimous points victory over Cotto.

Gonna fly now: The Canadian pop star got to hold two of Floyd's many belts ahead of the big fight

Work time: Justin was dwarfed by a mighty looking 50 Cent as the two artists entered the ring carrying Mayweather's belts
Speaking to US broadcaster HBO after the fight, Mayweather stated his desire to face Manny Pacquiao next and said: 'This fight right here, I was looking to fight Manny Pacquiao.'
After the victory Bieber jumped straight back into the ring to congratulate and celebrate with his pal and the other music stars.
50 Cent didn't waste his opportunity in front of the cameras to advertise his new SMS headphones and wore a baseball cap with the company's name on.

True gentleman: Miguel Cotto received a consolation Floyd Mayweather Jr after he lost the fight

The money man: Mayweather is lifted into the air with all of his championship belts
His fellow rapper Lil Wayne was casually dressed in a hoody and T-shirt and flashed his diamond encrusted teeth when smiling with Mayweather's latest belt.
As the four big name stars stood in the centre of the ring, Floyd looked over and delicately patted Bieber on the back of his head.