The best-selling warbler is said to have found love once more with her Hollywood director friend.

Singer Mariah Carey is said to be dating Rush Hour director Brett Ratner – who also directed several of her music videos.

They have been friends for years and have become closer since she split from second husband Nick Cannon last summer.

This weekend they celebrated their joint birthdays by flying off to the Caribbean island of St Bart’s in Australian billionaire James Packer’s private jet.

Carey turned 45 on Friday and Ratner was 46 on Saturday.

A source told Radar Online: “Their relationship has progressed in recent weeks and is now very serious. They’re a hot couple.”

Ratner has directed several of Carey’s music videos, including Heartbreaker, Obsessed and We Belong Together.

America’s Got Talent judge Cannon, 34, filed for divorce in January.

Cannon is the father of Carey’s twins Monroe and Moroccan, who turn four next month.