Whoa. At first, you would've have thought that diva and glam goddess Jennifer Lopez didn't heed the Grammys warning about the dress code -- which advised against side boobs, butt cracks and nip slips -- because the diva showed some serious leg.

But hey, as she pointed out, the rules said nothing about leg.

The singer/actress/dancer/fashion designer/perfumer wore a black Anthony Vaccarello gown that was asymmetrical, baring one thigh and one shoulder. The front slit was cut up-to-here, leaving little, if anything, to the imagination. Leave it to J. Lo to make a thigh the sexiest thing we've seen all night -- and to channel Angelina Jolie at the same time.

Jason Merritt, Getty Images