"Take Off Your Shirt" is not your typical Bibio track. It's more of a Weezer-esque rock track -- very different than Bibio's usual stuff. And that is something admirable: that they are taking a risk to make a track like this. I think Hockeyluv21 said it best about a month ago on YouTube:
"Bibio has huge balls for pulling this song off, because 70s Rock Revival isn't all that trendy at the moment."
No, it's not. But they certainly do pull it off.