Question: Who sings i have had the time of my life?
Disambiguated questions and answers: question: Which man sings i have had the time of my life?
Which woman sings the main vocals for i have had the time of my life?
answer: Bill Medley
William Thomas Medley
Jennifer Warnes
Jennifer Jean Warnes
Natural Questions answer: Bill Medley and Jennifer Warnes (from the Wikipedia article "(I've Had) The Time of My Life")