Judging by her appearance in the Victoria’s Secret bras I would guess that the rumor got started because her breasts are very rounded and usually very round , large breasts are not natural. I guess that is a testament to how well the VS bras enhance the area.
Also, it wasn’t that long ago that models having larger breasts wasn’t “in”. The waif look was popular. If I recall correctly this was about the time that Tyra showed up on the modeling scene. Perhaps you all owe her for making breasts popular again?
And so as not to be too much off topic (even though I’m sure it’s already been done) My favorite booby.