“Loving my new manicure," Kelly, 28, kvelled alongside a snap of her glittery silver nails, which nicely matched the round-cut, custom-designed Tiffany solitaire decorating her all-important finger. "thank you #esnails."
She offered up a second view of the ring in a shot that shows her clasping the well-tended, cross-bedecked hands of her father, Ozzy: "My dad got his nails done too! Look how cool they look!"
According to Kelly, Mosshart got down on one knee to pop the question on an ocean-view balcony on the island of Anguilla. The proposal took place on New Year's Day, but they waited until now to announce it because she wanted to have the bauble on her finger.
"I designed it to look like an earring that my father wore when I was little," she explained. "I used to hold my finger up to his ear when I was little and say, 'I want a ring like that.' Now I have one!"
What makes their relationship work? "I've never felt this close to another human being, ever," gushes Osbourne. "People say we're co-dependent, but we just want to be together all the time."
Click on to see Ozzy's kicky nails and more pics of the happy couple ...