After winning the show in Saturday night's final, Kevin released his song All You Good Friends and the track has shot up the charts.
In Monday's midweeks the song was at Number 10 after just a day on sale and it could become The Voice's best charting single to date.
Kevin admits it's all been a bit overwhelming, explaining this week: "I've been in this Voice bubble for the last month where you're not really going to Tesco with the kids and all that normal stuff you do, and then since Saturday I've just been off doing things here, there and everywhere, so I've not really been able to take it in.
"But obviously I've looked at the iTunes charts quite a bit! Firstly, the fact that I've got a single out is just mind-blowing, but then seeing my name next to Sia and Drake, that's just crazy."
Speaking to DigitalSpy, Kevin said that keeping a eye on the chart was "quite scary".
"Firstly, it's important for me personally. It would kickstart my career and give me some breathing space to go and write the album," he said. "But I'm not just representing myself, I'm representing The Voice as well, and with it being the last BBC series and all the people that have worked so hard to do the show, I think they deserve a bit of success at the end of it all. I really hope it does well for them as well."
Kevin's single is available to buy now and will chart on Friday evening.