Spray the insert of your slow cooker with non-stick cooking spray.
Pour the cans of cherry pie filling into the base of the slow cooker.
In a small mixing bowl, toss together the white cake mix and melted butter, until crumbly dough forms. Pour the dough over top of the cherry filling in the slow cooker.
Set on low and cook for 3 hours.
Serve Slow Cooker Cherry Cake with vanilla ice cream or whipped cream topping.