The Carter couple may have added even the most luxurious car in the world to their car collection.

This week, Rolls-Royce unveiled the $ 28 million Boat Tail for a customer who clearly has the luxury of buying it.

"This fantastic car is thought to have been commissioned by Beyoncé and Jay-Z, as many details match their favorite things," an industry expert told the Telegraph.

Built for the Mediterranean alleys of the French Riviera, where Beyoncé and Jay-Z have often been, the luxury car features a refrigerator to keep Armand de Brignac cool. (Jay-Z sold 50% stake in Armand de Brignac to Moët Hennessy in February).

The car is blue - probably related to their daughter, Blue Ivy - as well as a men's and women's watch from Bovet 1822, which you can leave in the car or carry with you.

Torsten Müller-ötvös, CEO of Rolls-Royce Motor Cars, called Boat Tail "the most ambitious project to date". Of course Beyoncé and Jay-Z, with assets of $ 500 million and $ 1.4 billion respectively, can afford it.

Representatives of the couple have not commented, while Rolls-Royce has not given any comment on the speculation for the car owners.