I think we all know who's the one that's not really in line here....
One of these things is not like the other, One of these things just doesn't belong, Can you tell which of these things is not like the other, By the time we finish this song?
Addition to the pool makes it obvious, but this belongs there.
Don't really think so. There's not even an artist commentary to imply it has something to do with breasts. It's just an image of 4 specific girls together for no specific reason till proven otherwise.