The couple announced their engagement in December 2010 and tied the knot in a small, private California ceremony in April 2012.
Rimes and Cibrian decided to renew their vows on Friday, five days after their anniversary, surrounded by a small group of family and friends.
"Renewed our vows today," Rimes shared via her Twitter account.
"It's incredible to thank each other for the past year as husband and wife. Here's to another great year!"
The 29-year-old previously confessed that she considers love to be her greatest accomplishment.