Bieber’s one-off RV cost him £2million to custom makeCredit: Marathon coach

It’s made by a luxury motorhome builder called Prevost in the US, which regularly converts RVs for the rich and famous.

Justin had his one custom-built, which will have cost at least £2million to complete.

The Prevost Marathon RV weighs in a 20 tonnes and needs a 500hp Volvo diesel engine that’s also used in boats to get it going.

Inside there’s underfloor heating for the winter and four air-con systems for those hot summer days.

It has three huge TVs, the finest Italian leather and marble throughout and the bathroom comes with a walk-in shower and a two-person sauna.

But perhaps the craziest feature is a fireplace – it’s gas, but it looks like the real thing and makes this RV feel like a genuine home.

If Justin wants to be outside, a huge electric awning can be put out at the touch of a button for shade.

Custom patio furniture is found in the storage compartments along the RV’s flanks and there’s a BBQ point to really get the party started.

You need deep pockets to buy and run a motorhome like this.

On top of the £2million price tag, Prevost RVs have a massive fuel tank that takes 840 litres of diesel.

At today’s prices in the UK, that’s around £1,600 to fill, although it needs that much onboard when it’s only managing an average of 8mpg.

Bieber has been spotted in his RV on tour but also out with his wife Hailey on what has to be one of the most luxurious camping trips in the world.

Justin has admitted he’s never actually driven the bus as “that’s probably not a good idea.”

The again, when you’ve got enough money to pay somebody to take car of the driving, why would you?

This crazy RV even comes with its own fireplaceCredit: marathon coaches

The fit and finish inside is to an extremely high standard

Only the finest fabrics for Justin and his wife Hailey

A fully fitted kitchen means this is a lavish home away from home