And the Middletons, it seems, are just as taken with him.
Their online newspaper The Party Times, which is produced by Miss Middleton, announced: “We’ve got Bieber fever.”
Representatives for the Canadian singer confirmed that Party Pieces would be selling the Justin Bieber Party Kit, along with other items.
The set costs £20.89 and includes plates, cups, napkins, banner and balloons for up to 16 guests.
Cheaper alternatives include a pack of four badge necklaces for £1.99 and a pack of decorative award ribbons for £2.25. A pinata is also for sale for £13.99.
The Party Times article said: “Teenage girls around the world go crazy for Bieber. In fact, they love Justin Bieber so much that the op star now has his very own party-ware.”
The article goes on to give red carpet tips on “pop star” dress cards and how to turn your father into a fake paparazzi photographer.
It is thought that Party Pieces has seen a significant increase in business since the royal wedding, particularly from America.