Mariah Carey had a costume party where everyone dressed up as her except her!

Los Angeles - Mariah Carey held a costume party where her guests dressed as her.

The Without You hitmaker threw a party at a villa in Lake Como, Italy where she was joined by 40 close friends, who all channelled their inner Mariah.

A source told the New York Post's Page Six column: "Even the men dressed like Mariah. But Mariah went as her alter-ego, Bianca, and sported a jet-black wig."

The 46-year-old singer - who is engaged to Australian billionaire James Packer - was filming the party for her upcoming television series.

The 18th century Villa Napoleon - which can cost a massive $12 250 a night but was rented to Mariah with the compliments of Airbnb - has no less than 8 bedrooms, a bell tower, indoor gym and cinema room as well as stunning views of the lake.

The beautiful home is only ten minutes from George and Amal Clooney's Italian retreat and is described as a "stately and traditional home with soaring ceilings, symmetrical layouts and elaborate moldings and frescoes".