-- Nastia Liukin is doing back flips now that she's engaged.
"So this just happened..." she wrote, along with a photo of her new diamond ring.
The Olympic gymnast, 25, made it to the semifinals of the ABC reality show. Lombardi, a former professional hockey player, is the co-founder and COO of Venture Up, a web platform that caters to young athletes.
The couple has been together since at least last year.