Olivia Newton-John has how many more Grammy wins than the number of performers in the Main Event Tour?
The Main Event (1998 concert tour): The Main Event Tour was a 1998 joint concert tour by Australian singers John Farnham, Olivia Newton-John and Anthony Warlow. Olivia Newton-John:  She is a four-time Grammy award winner who has amassed five number-one and ten other top ten "Billboard" Hot 100 singles, and two number-one "Billboard" 200 solo albums.
i don't know