While the two are undoubtedly celebrating the special occasion privately, Hart took to Instagram to share a special message about his longtime love with his fans.
"Happy anniversary to my MUCH better half, 10 years is a pretty amazing milestone for 2 misfits like us," he wrote alongside a black-and-white photo of the two snuggling by a fireplace with their daughter, Willow.
Hart added, "I'm proud of us baby!!! Thank you for being an amazing wife, mother, and friend. I love you."
Back in early December, the Grammy-winning singer stopped by The Tonight Show Starring Jimmy Fallon and was asked if she's planning on working on new music in the coming year.
"Sort of. Maybe. I don't know. I'm not sure," she said while chuckling. "I'm in charge of the bake sale on Saturday. I'm really good at it."
As for what she had ready to go for Willow's classmates? The pop star joked, "This year I'm going to probably a deli in New York. I mean, normally I bake, but I'm getting home on Friday and it's on Saturday, so I want to throw it down in the bakery."