Dean, who was rarely seen in photos and in public, had been with Dolly Parton for over 60 years

The collaboration is set to be included on the group's new record 'Wiggle Up, Giddy Up!', out next month

"Dolly and me singing in a pickup truck!"

"Travelling the country and seeing how many people literally cannot bear to see a gay person depicted onstage, it’s wild"

The new project is due to come out on Valentine's Day (February 14)

It follows the group topping the Australian dance music chart last year with their first EDM album

“Whether you're chasing your dreams from a small town or you've spent years performing, I want to give you a chance”

"I wanted to tell a story about the importance of family and friends, especially during the holidays"

In the build to her new album, Halsey will portray the musicians that inspired several songs on 'The Great Impersonator'

He had worked as a director on his sister's 'Blond Ambition' and 'Girlie Show' tours in the 1990s