It's just an example of the [**Running Gag**](http://tvtropes.org/pmwiki/pmwiki.php/Main/RunningGag) trope. Unfortunately, in this case, they picked a song you don't like.... Additionally, the song showed up in *Warehouse 13* which indicated that the two shows might exist in the same universe...essentially, an Easter Egg for fans. ---------- Could they be getting their money's worth having bought the *usage* rights? Sure...but that's just plain business-sense.