Table:
text: Rockmelons
Discography
Singles
Year_ Title Lead_vocalist ARIA_chart_position Album_
1985 Time Out (For Serious Fun) Sandi Chick N/A -
1985 Sweat It Out Peter Blakeley N/A -
1987 Rhymes John Kenny N/A Tales of the City
1987 New Groove John Kenny N/A Tales of the City
1988 What`s It Gonna Be John Kenny N/A Tales of the City
1988 Jump Wendy Matthews N/A Tales of the City
1988 Dreams in the Empty City John Kenny N/A Tales of the City
1988 Boogietron Ensemble N/A Tales of the City
1991 Ain`t No Sunshine Deni Hines 5 Form 1 Planet
1992 That Word (L.O.V.E.) Deni Hines 4 Form 1 Planet

Question: Who was the lead singer of Rockmelons in "Sweat it Out"?