Underwood received a bright-yellow diamond ring from NHL star Mike Fisher when he proposed in December of 2009.
They had been dating for an entire year, and they got married in 2010.
It belongs to Scarlett Johansson, from fiance Colin Jost, a 'Saturday Night Live' writer and actor.
They got engaged in May of 2019, and Johansson added this unique piece to her ensemble.
A Diamond Hockey Puck
Which long-time celebrity sports this sport-inspired 5-carat ring?
It's the very first 'American Idol' winner and country music star, Carrie Underwood!
This Ring Gives a Pop Star Extra Pop
This ring offers a special design and flower shape, the perfect thing for a fabulous star who loves to thrill with her appearances, from an actor boyfriend who has his own flair for beauty.
California Gurl Katy Perry now has this ring (on her index finger, come on, Katy) when Orlando Bloom popped the question.
It's been estimated to be worth anywhere from two hundred and fifty thousand to a million dollars.
The couple has yet to reveal the ring's composition.