> Can anyone tell me the song in that Kohl's commercial with the ice cream man?
sure. it's 'Ice Cream Man' by Jonathan Richman and the Modern Lovers. you can find it on a lot of his greatest hits-type compilations, like 'The Beserkeley Years' or 'Home Of The Hits'. I don't know whether the ad uses the same version (originally from 1977) or a new recording.
Most people probably know Jonathan as the singing narrator from 'There's Something About Mary'. He's much less annoying than that, I swear! :)
A lot of his songs are love ballads like in 'Mary', but plenty of others are silly fun like 'Ice Cream Man'. Jonathan's a treasure.