The Canadian pop star has signed a deal with the Middleton family's party planning company Party Pieces, which will be the official retailer of Bieber's merchandise in the UK, the Sydney Morning Herald reports.
The announcement comes after Bieber (17) signalled his admiration for Kate's little sister, who rose to global prominence following her role as bridesmaid at last month's royal wedding.
"Congrats to William and Kate ... and Kate's sister. She was a hit," he tweeted.
Party Pieces will now sell plates, cups, hats and decorations bearing Bieber's image.
A pinata of the tween sensation will also be available.
Pippa Middleton's star is also in the ascendant.
Since accompanying her sister down the aisle at Westminster Abbey in April, she has been inundated with job offers, magazine deals and film roles.
Her appeal to the wider public has also continued to grow. The Pippa Middleton Ass Appreciation Society page on Facebook has over 227,000 fans and the ensemble that she wore the day after the royal wedding, which included a Zara jacket and Modalu handbag, sold out online within 24 hours.
Despite the media storm, Pippa has continued her part-time jobs with top London events company, Table Talk, and editing an online magazine for Party Pieces.
