Ellen DeGeneres was amusingly shocked by Katy Perry’s ample bosom at the Grammys on Sunday.

The pop star had some of her breast, er, best assets on display in a skin-tight green dress, and DeGeneres and wife Portia de Rossi couldn’t help but notice — and joke.

Perry, too, seemed quite entertained by DeGeneres’ reaction....as did every other man who was lucky enough to see Katy!