PHOTOS: Elton John & Ellen DeGeneres ogles as Katy Perry flaunts her breasts at the Grammys

Katy Perry missed out on a Grammy award but still caused one of the biggest sensations of the night in a daring gown.

The 28-year-old singer's mint green Gucci dress featured a keyhole cut-out that showed off her gravity defying curves.

Even Elton John was caught out cheekily eyeing up Katy, while TV presenter Ellen Degeneres made a joke of the unmissable subject.

pictures after the break...