The country music singer took to Instagram on Monday to share a collage commemorating their eight years as husband and wife.
"I LovE you," she captioned it, tagging her husband in the post.
The anniversary comes just one day after the two celebrated Easter with Cibrian's ex-wife, Brandi Glanville, and the two children they share together -- Jake, 12, and Mason, 15 -- in Malibu, California.
"Happy Easter LovEs! Our awkward family Easter ? photo/Christmas card?! Lol," Rimes captioned an Instagram pic. "Today has been a wonderful day. Many blessings to your family from all of us! #easter #happyeaster #easter2019 #family #ifyoudonthavesomethingnicetosaypleasemoveon."
"Awkward -- the way we are standing, not that we are all together," she clarified. "Not awkward at all. #clarity."
Glanville also shared a few snaps from the celebration, though hers noticeably didn't feature Rimes. "Easter dinner with the two loves of my life❤️❤️❤️," she wrote. "#forever my boys #casual #happymom ❤️❤️❤️."
Rimes, 36, and Cibrian, 45, tied the knot on April 22, 2011. The two began dating in 2009 after appearing together in Nora Roberts' Nothern Lights. At the time, Cibrian was still legally married to Glanville -- they finalized their divorce in September 2010.
Speaking with ET last July, Rimes admitted that she sometimes thinks about wanting kids of her own someday with Cibrian.
"Actually, I get [baby fever] every once in a while!" she said. "I'm trying to figure out what it is that stirs it. I haven't figured that out yet, because every once in a while I'll be like, 'What is making me want a baby, like, right now?' I haven't figured that out yet, but it hasn't stuck."
"Maybe one day," she added. "I mean, I love my stepkids and I get plenty on my plate with them. So, I'm cool at the moment."