Celebrations: Beyoncé enjoyed some well-deserved downtime as she partied at London’s Harry’s Bar until 4am on Sunday

Showcasing her off-duty style, the Grammy winner swapped her head-turning stage costumes for a simple white T-shirt as she left the venue via the backdoor.

The superstar relaxed in her car and displayed her slender pins as she got comfy in her seat and highlighted her strappy stilettos.

The former Destiny Child’s star accessorised her ensemble with a pair of red framed shades and placed her leather bag with studded detailing across her lap.

Although trying to remain incognito leaving the hotspot, she kept to her glamorous ways as she styled her blonde locks into a voluminous half up, half down style.

Low-key: The 36-year-old Halo songstress partied up a storm with her rapper beau, who wasn’t pictured, at the exclusive private Mayfair club until the earlier hours of Sunday morning following their stellar concert

Her late-night appearance comes as she and husband Jay-Z  filmed their latest joint music video in famed French museum The Louvre for their latest track Apes***t.

And now the museum has revealed just how the musical duo managed to gain permission to film their cinematic video in the midst of priceless masterpieces.

In a statement to Vulture, the Parisian gallery – which houses Leonardo da Vinci’s Mona Lisa among many other world-famous artworks – explained the couple’s connection to the museum, as well as how they kept everything under wraps.

A spokesperson told the publication: ‘Beyoncé and Jay-Z visited the Louvre four times in the last ten years. During their last visit in May 2018, they explained their idea of filming.’

Making a dash: Showcasing her off-duty style, the Grammy winner swapped her head-turning stage costumes for a simple white T-shirt as she left the venue via the backdoor

Party people: The pair partied at Mayfair members’ club Harry’s Bar

Despite their level of fame, the filming of the couple’s six minute-long music video went completely unnoticed, with fans being totally surprised by the release on Saturday.

Explaining why they allowed the music video to take place, the rep continued: ‘The deadlines were very tight but the Louvre was quickly convinced because the synopsis showed a real attachment to the museum and its beloved artworks.’

While it’s not known how much the duo dropped for their secretive filming, The New York Times explained that around 500 film shoots happen at the museum each year and a private shoot around the artwork costs around $17,500 (£13,206).

Relaxed: The superstar relaxed in her car and displayed her slender pins as she got comfy in her seat and highlighted her strappy stilettos

Performance: She played two spectacular gigs over the weekend at the London Stadium alongside her husband Jay-Z for their On The Run II tour

The revelations come as Beyonce and Jay-Z have been travelling around the UK in the European leg of their worldwide tour, in the follow-up to their hugely successful 2014 On The Run tour.

The tour is set to conclude in Seattle on October 4, with the UK leg finishing on Saturday.

It was announced last month that R&B duo Chloe x Halle and DJ Khaled will be the opening acts for the North American leg of the tour kicking off on July 25 in Cleveland.

Art: Her late-night appearance comes as she and husband Jay-Z filmed their latest joint music video in famed French museum The Louvre for their latest track Apes***t