It's The Punkin Patch by Andy Z and The Beeheads.
They're the cutest bunch of punks around and I really, really want that orange and yellow tie dyed t-shirt! That easily and instantly conveys the feeling of Halloween!
If you have little ones, you can buy Andy Z's pockets on CD or MP3 by clicking right here. It includes Punkin Patch and a number of familiar children's songs.