I WORE $20K ON MY NECK AT MAYWEATHER FIGHT - JUSTIN BIEBER

Looking like he wandered off the set of "Goodfellas," Justin Bieber rocked a golden diamond-encrusted fish around his neck at the Mayweather fight on Saturday -- and TMZ has learned, the thing cost $20,000!!!

Sources tell us, the 14k gold "koi" fish -- designed by celeb jeweler Ben Baller -- boasts 14 carats of VVS diamonds all over (supposedly fancier than normal non-VVS diamonds). Even the chain is covered in 12 carats of diamonds.

it's unclear if the necklace was a gift or if Bieber paid for it himself.

FYI -- Koi fish represent good luck. Not like Mayweather needed it.

BIEBER SAID KNOCK YOU ! - FLOYD MAYWEATHER

Of course Floyd Mayweather took care of business last night against Miguel Cotto -- he had the dreaded masters of intimidation in his corner, like Lil Wayne, 50 Cent and ... Justin Bieber?

Bieber walked out with Mayweather before the fight and was in the ring with him after to celebrate the victory.

It's unclear how the two hooked up, though Bieber did once compare himself to Mayweather in an interview. Earlier in the day, Bieber tweeted, "cinco de mayo.... #MayweatherCotto yeah @FloydMayweather today is a BIG day."

So we have to ask ...

JUSTIN BIEBER'S VEGAS FIGHT NIGHT

After the release of his music video for “Boyfriend,” Justin Bieber took some time to enjoy his success in Las Vegas, NV on Saturday night (May 5).

The record breaking fight of Miguel Cotto vs. Floyd Mayweather Jr. brought in more than 1.5 million pay-per-viewers, and the 18-year-old singer shared his excitement about being in attendance as he tweeted, “cinco de mayo... #MayweatherCotto yeah @FloydMayweather today is a BIG day.” Bieber followed up with the simple hashtag tweet “#FIGHTNIGHT.”

Mayweather won the fight and the “Never Say Never” singer was the first person to congratulate the boxer and acted as his guest of honor. Bieber was also joined by rappers Lil Wayne and 50 Cent after the match, which was held at the MGM Grand Garden Arena.

The victor took to Twitter to share his thanks to the teen sensation after the fight, messaging, “@justinbieber keep up the great work and thanks for the support #TheMoneyTeam. Enjoy the fight.”

SOME OF MY BEST FRIENDS ARE WHITE - FLOYD MAYWEATHER

Floyd Mayweather couldn't possibly be a racist ... because he employs sooooo many white people!

The boxing superstar has been in hot water ever since he tweeted that New York Knicks guard Jeremy Lin was only receiving attention because he was Asian.

Mayweather has stood by his words and when he was asked about it yesterday, he proceeded to mention all the white people around him ... even pointing out that one of them "does a tremendous job."

Now that's progress.

L.A COURT ORDERS MANDELA'S DAUGHTER TO PAY $7.5M

Zindziswa Mandela, Nelson Mandela’s daughter has been ordered by an L.A court to pay a sum of $7.5M (N1.92B) after she allegedly failed to stage a high profiled boxing match between Floyd Mayweather and Manny Pacquiao.

The whole dispute started back in April 2011 when boxing promoter Duane Moody filed a lawsuit against Mandela, claiming that she owed him ‘millions of Dollars’ emanating from a failed attempt to stage the Pacquiao/Mayweather fight. The bout was to hold in Soweto, South Africa to celebrate Nelson Mandela’s 93rd birthday.

Reports say the fight, which Mandela apparently expected to raise $100M (N15B) from, was due to have taken place in November 2011.

Moody also claims that he was promised 15 per cent of the money, but negotiations collapsed. He also claims that he was even thrown out of his hotel in L.A because Mandela who had promised to pay the hotel fees failed to keep to her word.

TMZ reports that Mandela never responded to Moody’s complaint and as a result of that, the judge awarded the promoter $7.3M (N1.7B) plus costs.

‘We haven’t heard anything from any representative for Ms Mandela. It appears she feels hiding in South Africa means she can avoid her obligations in the US’, Moddy’s lawyer said.

TMZ also reports that Zindziswa Mandela, who is the second child of Nelson Mandela’s second wife Winnie, plans to challenge the judgement.