"Renewed our vows today," Rimes tweeted. "It's incredible to thank each other for the past year as husband and wife. Here's to another great year!"
The couple also celebrated being married for a year by staying at the private home in California where they originally married. For gifts, Rimes gave her husband a watch and, in turn, he gave her a ring.
Cibrian, 38, and Rimes, 29, tied the knot on April 22 last year.