The Boyzone star (44) has owned models by Bentley, Rolls-Royce, Mercedes and Ferrari in recent years.
However, he said it was impossible to pinpoint what he had "on the driveway" because many of his models were being worked on all across the UK.
Outside of his work with Boyzone, the Dubliner has competed in the British GT Championship and British Drift Championship.
"My cars swap and change all the time because I'm a car lover. I'm a car nut. I'm a car enthusiast. I'm a car junkie. I have problems about cars," he said.
Lynch said he was like his mechanic father in that his car collection was constantly changing.
"I've always seen his driveways swap and change with machines, from American style to British style. He had a few German whips on there," he said.
"So my own was inherited from his love of cars. I get a crisis every few years of sell, sell, sell.
"I collect, collect and then look at them all and go sell, sell, sell and then I recollect."
Lynch said he always had at least three car builds on the go.
"They're always like six months to a year," he said, "so my car collection isn't quite direct, I can't pinpoint what's on the driveway."
Lynch has been announced as the face of the relaunched Men and Motors TV, which he will co-host with sports journalist Torie Campbell.
The channel first aired in 1996 and helped kick-start the careers of presenters including Richard Hammond and John Inverdale.