Why is Jay Z shopping for jewellery with Solange?

Beyonce and Jay Z attend The Metropolitan Museum of Art's Costume Institute benefit gala, hours before Jay Z was attacked by Beyonce's sister Solange. Photo/AP

Jay Z has reportedly been seen shopping for jewellery with his sister-in-law Solange Knowles, the day after footage emerged showing her viciously attacking him in an elevator.

The pair allegedly stopped by Mr Flawless in midtown Manhattan, where they spent 20 minutes perusing women's jewellery, reports TMZ.

Sources told the website the duo showed "no signs of strife" during the outing, and were shown around by the store owner, Greg Yuna, aka Mr Flawless.

Jay Z, 44, and Solange, 27, reportedly tried nothing on and left the shop without buying anything.

According to TMZ, they didn't speak much when inside and "browsed quietly".

The alleged jaunt comes a day after a hotel surveillance video was leaked showing Solange - Beyonce's younger sister - lashing out wildly at her brother-in-law, with both her arms and her legs, while her sister stood beside them looking curiously impassive.

The famous family were in an elevator descending from a soiree that followed the annual fashion fest at the Metropolitan Museum of Art last week.

The seemingly unprovoked attack plays out in footage obtained by TMZ.

Solange can clearly be seen kicking and swinging violently at Jay Z, the father of her two-year-old niece, Blue Ivy, after the trio step into the elevator.

Solange was screaming at her family member when the fight erupted and can be seen in the footage mouthing what appears to be a diatribe at the hip-hop legend, according to TMZ sources.

In the footage, a man who looks to be a bodyguard tries to hold Solange back but she manages to rain blows on the rapper several times, and even hits him with her purse.

Watch: Beyonce's sister attacks Jay Z

According to the New York Daily News, the blazing row was sparked by Jay Z, who snapped at Solange when two of her friends tried to use his name to get into the starry after-party at The Standard hotel in Manhattan following the gala last week.

And it was when Solange demanded they leave that Jay-Z said he was heading off to Rihanna's bash without Beyoncé', prompting Solange to hit out at him.

A source said Solange's pals "wouldn't leave and kept name dropping Jay Z. They were pretending they were guests of his and not hers. Management went to Julius (Beyonce's bodyguard) and said, 'There's a problem'."

Jay Z soon got wind of it and snapped at Solange, saying "don't use my name". This in turn prompted Solange to insist that she wanted to leave the bash.

On the way out, Jay Z said he'd be heading to Up & Down on West 14th Street, where Rihanna was holding her own post-Met Ball bash, a second source said.

Allegedly, the star said he didn't need extra security because Beyoncé was not joining him.

The source said Solange, who seemed "drunk and irritated", said: "Why can't you go home?" telling Beyonce, "Why does your husband need to go to the club right now?'"

But Jay Z replied: "You're one to talk," which sent Solange into a rage. Once inside the elevator, she started punching and kicking her brother-in-law - an attack that was caught on surveillance video and leaked to TMZ.com.

Ultimately, the rapper decided against going to Rihanna's party and he was seen getting into a separate car as Beyoncé and Solange left together.

Jay Z and Rihanna are longtime cohorts. While president of Def Jam, he signed the Barbados beauty in 2004 and just days ago she signed to his label Roc Nation. She is also managed by Roc Nation.

Reps for Beyoncé, Jay Z and Solange did not return requests for comment.

MailOnline told how Jay Z has reneged on repeated promises to help boost Solange boost music career, according to sources.

And a family friend today revealed the simmering tensions that has led to the family feud, saying: "He hasn't kept his promise to help her. Jay keeps telling her to give him some time and he will sit down and write with her and then get her into the studio but he hasn't done it yet."

The source added: "Solange's album is coming out soon but there is no buzz about it, which is a bad sign within the industry.

"Solange wants a major career like her sister and she's tired of living in her shadow. She's jealous.

"Jay Z promised he would help take her to the next level but he never found the time to keep his word."

Us Weekly has reported that Solange first lost her temper with fashion designer Rachel Roy, a close friend of Kim Kardashian.

Image 1 of 8: Sandra Lee. Photo / Getty Images

The publication claims that Solange "yelled" at Rachel - who recently attended Kim's baby shower - on the night of the Met Gala after-party.

Beyonce is believed to have got in the middle of an argument between the pair, although it is unclear what it had stemmed from.

It was also reported that Solange was seen arguing with a number of other people at the bash.

Rachel is considered to be one of Kim Kardashian's closest confidantes and was even invited to Kanye's proposal to Kim last year.

Always in Beyonce's shadow despite her own immense talent, Solange had a few stints in Destiny's Child, before signing with her father's Mathew's Music World Entertainment label; he and he girls' mother Tina had quit their jobs to focus on their eldest child's career.

Image 1 of 12: Blake Lively in a glittering gown by Gucci. Photo / Getty Images

But it paid off for Solange initially, too, as her her first studio album Solo Star - released when she was just 16 in 2003 - was a quiet success.

Just a year later, however, she married Daniel Smith, and after giving birth to their son Daniel Julez J Smith Jr, moved to Idaho, where she occupied herself with writing music for her sister and ex Destiny's Child stars Kelly Rowland and Michelle Williams.

But she missed the buzz of performing herself and after divorcing Smith in 2007, Solange threw herself back into the fray moving to Los Angeles so she could begin to start recording her own material.

It paid off as her second album, Sol-Angel and the Hadley St Dreams, hit No. 9 on the Billboard 200 and garnered positive reviews.

She set up her own label, Saint Records, and recorded the album, True, in 2012 and has plans for a follow up later this year.

While no Beyonce, Solange is recognised as fashion icon and her Motown songwriting roots are respected throughout the industry.

The formerly solid family was rocked in 2009 when the girls' mother Tina filed for divorce from Mathew, who was then still Beyonce's manager, after it emerged he'd fathered a child during an extra-marital affair with Alexsandra Wright.

The Crazy in Love singer singer later ended her business relationship with her father, and neither sister attended his wedding to Gena Avery last year.

As a family unit, they've still remained strong it had seemed, with Solange mentioning frequently in interviews that her son Juelz and her niece Blue are more like siblings than cousins.

Beyoncé and Jay Z have remained silent on Twitter following the incident, but Solange rather oddly tweeted on Sunday: "This might have been top 10 days ever in life."

This might have been top 10 days ever in life

A few days after the Met Gala, the sisters apparently made a getaway to Costa Rica, where they apparently joined Kelly Rowland for her secret wedding.

According to Us Weekly, Kelly's wedding took place on Friday and was a "quick, simple ceremony - only around 30 people".

On Thursday, three days after the attack in an elevator at The Standard hotel in New York, Beyoncé and Solange arrived in Costa Rica onboard a private plane around 7.56pm, according to E!.

It comes after it was reported in local paper La Nación that their mother Tina Knowles, Destiny's Child member Michelle Williams and Kelly's fiance Tim Witherspoon were also in Costa Rica, suggesting it was for Kelly and Tim's nuptials, which has now been confirmed by UsWeekly.

Beyonce added further fuel to the fire by posting a picture on her Instagram, looking as though she was dressed in a bridesmaid outfit.

A STATEMENT FROM THE STANDARD HOTEL

While there still has been no word from either Beyonce or Jay Z's representatives, a spokesperson from The Standard Hotel in New York City has made a statement.

Following calls regarding the leaked CCTV footage, reps for The Standard Hotel told MailOnline, they were "shocked and disappointed" in what had been a "clear breach of our security system".

They said in a statement: "We are investigating with the utmost urgency the circumstances surrounding the situation and, as is our customary practice, will discipline and prosecute the individuals involved to our fullest capacity."

- Daily Mail