In October last year and just after receiving the news he would be going to Orlando, Taylor and his mother, Jaya Kingi, were in a serious car crash that left the teenager with injuries and his mother fighting for her life.
"I guess that was a real catalyst for me really wanting to win this competition - I've realised life is short and I really want to make my Mum proud," he said.
Taylor was runner-up in the Find a Star contest run by TVNZ show Good Morning last year.
Taylor is taking his brother, Mark, who he hopes to sing with while in Orlando.
Ms Kingi said she was incredibly proud of her youngest child.
Included in the Orlando prize package is a three-day trip to Nashville, Tennessee and an audition with Disney.
"Whatever I bring home from this trip, the doors it will open and the experiences it offers are just incredible."
To follow Zac Taylor's progress and to vote before the grand final, go to www.voiceofmcdonalds.com