Kevin's winner's single has dropped out of the Top 100 this weekend, falling more than 75 places.
The winner of The Voice 2016 charted at Number 24 with his song All You Good Friends last Friday, the first time that any champ from the show has released an original single.
The chart result - with 24,000 sales - was the second most success that any winner from The Voice UK has had of the show's five series so far, with two of the previous four champions having not even made the Top 40 at all.
As winner of The Voice, Kevin has signed a record deal with Universal although it seems he still can't quite believe it.
He posted to Facebook recently: "That moment when you win BBC The Voice UK!! Overwhelmed by everyone's support and can’t thank you all enough!
"I still can’t believe this happened! Thanks so much to anyone who’s bought the single so far."
As well as his new solo career, Kevin is set to reunite with his Liberty X bandmates for gigs they booked before his stint on The Voice.
"We had a gig booked in for Birmingham Pride with the band and I'll do it. It'll be unfair not to do it," he said this week.
But speaking on ITV's Lorraine, Kevin admitted he found the solo career more "exciting".
"It's more exciting now. I loved [Liberty X], of course it was brilliant, but to get this opportunity now it's unbelievable," he explained.
You can watch the new official video for Kevin's All You Good Friends here...