Pop superstars Justin Bieber and Taylor Swift have joined forces to promote the worldwide Fashion's Night Out event.

The international celebration of fashion will take place on September 6 in stores around the world, which will remain open for longer in certain cities to make time for hosting meet-and-greets with designers, celebrities and models.

The 'Boyfriend' heartthrob appears in a new video with Swift where they talk about Fashion's Night Out and Bieber can be heard explaining that there will be chances to hang out with catwalk beauties: "And who doesn't want to meet models, right?!"

A message on Fashion's Night Out's official website explains the event further: "Join editors, stars, models, fashionistas, and designers on September 6, 2012, as they flood stores in cities across the country and around the world for fashion's most iconic extravaganza."

Watch the newly unveiled promotional clip below: