Pop star Justin Bieber has joined forces with fashion retailer Forever 21 for the launch of an exclusive capsule collection to celebrate his Purpose World Tour.

The eight-piece range, dubbed the "Forever 21 x Justin Bieber Purpose Tour Collection", will include an assortment of hoodies and sweatpants, in addition to sleeveless T-shirts and short-sleeve T-shirts carrying images of Bieber, and a long sleeve T-shirt imprinted with the words: "Justin Forever".

The limited-edition collection will debut at forever21.com on August 22, and will be available for purchase in stores one week later, from August 29, with retail prices ranging between $17.90 and $34.90.

Commenting on the tie-up, Linda Chang, Forever 21 vice president of merchandising, said:

"We are pleased to partner with Justin Bieber and Bravado to celebrate one of the most influential musicians of this generation.

"This collection will give our customers and Justin Bieber fans access to one of the most in-demand merchandise lines in the world."