Now gentlemen, if you can't see through Heidi Klumm's allegedly see-through top: t'is is not my fault. I can't either.
As I am no learned journalist (obviously) I haven't learned to trust my eyes and therefore am dependent on the kindness of strangers... I meant accurateness of our sources (in this case the appropriately named website The Nip Slip!). In this case the source tells me explicitly that Frau Klumm is wearing a translucent black thingy.
Who am I to question such alluring assertions, even if photo material on hand doesn't whole-heartedly support the claim?