How fancy!

Iggy Azalea got the surprise of her life when NBA boyfriend Nick Young dropped down on one knee and asked her to marry him at his 30th birthday party on Monday, and her new yellow diamond rock is completely insane!

Party guest Karen Civil captured the happy moment in an Instagram video, and it's pretty much the cutest thing we've ever seen. "Swaggy P celebrated his birthday tonight by popping the question to his girlfriend Iggy!" she captioned the clip. The Australian rapper slipped on her new bauble, which her man designed himself with the help of jeweler Jason of Beverly Hills, and the whole crowd cheered!

"Nick was very involved in designing the ring. We wanted it to be both a ring of Iggy's dreams and a ring that fit her personal style. It is always an honor when a client trusts me to help design a ring that symbolizes one of the most important decisions of their life," Jason Arasheben, CEO of Jason of Beverly Hills told Us Weekly.

The "Fancy" songstress shared the the big moment with her fans, and had a sweet message for her new fiancé! "Happiest Day #Isaidyes. Love you @swaggyp1," she captioned a photo of the pair after the proposal.

Too cute!