J.Lo joked about CBS's now-infamous wardrobe memo, but Katy Perry openly defied it — and some took notice.

Some more than others.

Ellen DeGeneres, for instance, wasn't at all shy about grabbing an eyeful of Perry's mint-green Gucci gown — specifically its deep decolletage — to the point that she had to be led away by wife Portia de Rossi.

Some other things may have happened at the Grammys lat night, but after staring so intently at Perry's Teenage Dream, the subsequent solar retinopathy made it impossible to tell.

[photos via Getty]