Carrie Underwood’s diamonds were what everyone was talking about prior to the 2016 Grammy Awards. The exquisite necklace was a Valentine’s Day gift from husband Mike Fisher, and the nominated singer says she doesn’t deserve it. It even has its own name!

"It's mine to wear,” Underwood tells ET Online of 'The Heartbeat,' “so whenever I feel like it, I can be in my sweat pants, making dinner, wearing my necklace."

The necklace was the highlight of Underwood’s red carpet look, which included a Nicolas Jebran gown with a significant split. It could be the only time Underwood’s famous legs were overshadowed. Jonathan Arndt made the 48-combined-carat necklace, and Underwood says she knew it was coming.

"We don't do a whole lot of gifts often, it was nice,” she admits. “This is many years' worth of gifts."

The signature diamond is the 12-carat 'Firefly Diamond,' a flawless yellow rock. There are also 20 carats of rubies and 16 carats of white diamonds. A pair of diamond stud earrings complete the look.

Underwood brings jaw-dropping fashion to the Grammys every time she’s at the show. In 2013 she wore a $31 million necklace from Johnathon Arndt, although she had to give back that 381-carat bobble. That same year she performed in a silver gown that lit up with images from a projector.

Underwood performed a mashup of her song "Heartbeat" and "Take Your Time" with Sam Hunt at the 2016 Grammys.

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