Can anyone identify this song I heard on "How I Met Your Mother"?

I am looking for the name of this song that was on How I Met Your Mother:

It's in season four and the episode name is "Shelter Island" (The one where Ted gets left at the altar by Stella) When they are going to Shelter Island the car, then on the boat and then in the car again, there is a song playing in the background. It's a guy going "Bum Bum Bum". Does anyone know the name of this?

P.S- I <3 Marshall Eriksen

Update:

Thank you so much!!! Sorry, I don't have enough points to rate.

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