In 1996 the band released "Murder Ballads", their best-selling album to date. Centered on the subject of murder, the album includes a cover of the folk song "Henry Lee"—a duet with British rock singer PJ Harvey, with whom Cave had a brief relationship— and "Where the Wild Roses Grow", a duet with Australian pop idol Kylie Minogue. The Minogue collaboration was a mainstream hit in the UK and Australia, and won three Australian Recording Industry Association (ARIA) Awards, including Song of the Year. It was at this time that Ellis of the Dirty Three began regularly working with the band and eventually became Cave's primary collaborator.