"I haven't performed in front of that many people before. I'm knackered after singing for three hours so I'll probably sleep right up to it. \
"I really enjoyed myself, I can't believe how nice everyone is. It was great to see the looks on everyone's faces."
Upton said he had experience singing around London and smaller towns in clubs. He said he had sung songs from several bands and singers at yesterday's event, including One Direction and Michael Buble, and he had received good comments from the listeners.
"It has been really good fun, I just wish the weather was better - but I'm used to that."
He said after he counted his busking money, he would give a percentage to youth cancer support charity CanTeen.
Coming in at second place in the busking competition were Rotorua's Tiarah Laupua and Kylee Waaka, who received a $1000 Prezzy Card and a spot performing at the first Big Brunch on New Year's Day.
In third was Wellington puppeteer and painter Anna Bailey, who won a $500 Prezzy Card. Bailey wowed the crowd by painting pictures through her puppet Evaline.