The Australian musician, who recently took part in reality TV show Dancing With The Stars, said that her friend and fellow singer Campbell used "the threat of physical violence" to convince her to get in the studio.
"He has been getting very aggressive with me over the years," The Daily Telegraph quotes Schneider as saying.
"The last thing he said to me a few months before I recorded this album is, 'If you don't make this album I am going to hit you over the head.' So I thought to save myself bodily harm from David Campbell I better do it."
Campbell features on the Melinda Does Doris album, which has spent six weeks on the ARIA album chart.