tv/ movies: Gilligans Island: What does Mr. Howell use as a golf ball?

Questions

Duets - Who teamed up with Celine Dion for the No.1 hit 'I'm Your Angel' in 1998?

Duets - Another real easy one! Who sang with Michael Jackson to record 'Say,Say,Say'?

Duets - Who sang a duet with Elton John that produced the hit 'Don't Let The Sun Go Down On Me' in 1991?

Duets - Dionne Warwick had a No.1 hit song, 'Then Came You,' with what artists?

Duets - Paul McCartney teamed up with _________________ and had a No.1 with 'Ebony and Ivory' in 1982?