useless trivia: What Word Means: Converted Into Hay?

Questions

Duets - Patti LaBelle's duet partner on the song 'On My Own' was_________?

Duets - Peabo Bryson and ________________ had a No.1 hit in 1993 with 'A Whole New World'?

Duets - Lionel Richie and ____________ went to No.1 with 'Endless Love' in 1981?

Duets - Olivia Newton-John and __________________ had a No.1 hit with 'You're The One I Want' in 1978?

Duets - Who sang a duet with Peter Cetera on the song 'Next Time I Fall' in 1986?