Victoria Beckham joins Taylor Swift, Usher for Fashion's Night Out

Victoria Beckham is also joined by the likes of Justin Bieber, Darren Criss and Olivia Wilde in a charity promo video.

The stars are out in full force in the video for the annual New York City AIDS fundraising event Fashion's Night Out.

Appropriately, Glee's Darren Criss performs a rendition of Madonna's song Dress You Up!

The event, which sees shops from cities from New York and London to Paris and Hong Kong stay open late with special promotions, limited edition goods and special guest appearances, takes place on September 6th.

Victoria's boys were impressed that their mum has been hanging out with Justin Bieber!

'VB and JB!! @justinbieber Romeo and Cruz so impressed!! Join us @VogueMagazine's #FNO x vb,' tweeted the former Spice Girl.

Watch the video below: