updated 04/22/2012 AT 6:00 PM ET
•originally published 04/22/2012 AT 8:00 PM ET
Happy anniversary, indeed!
“I have a very thoughtful husband with GREAT taste!!!!” Rimes, 29, Tweeted on Sunday with a picture of her new jewelry.
The ring must be icing on the cake for Rimes, who still seems to be enjoying her honeymoon phase with Cibrian, 38. The couple were spotted at a romantic lunch at Toscanova in Calabasas, Calif., on Friday.
“All throughout their meal, they’d steal kisses or hold hands,” an onlooker told PEOPLE of the PDA-filled date. “They looked incredibly happy together. He had his arm around her shoulder and she would rest her head on the nook of his neck with her eyes closed.”
On Sunday, she also Tweeted, “Thank you all for the beautiful anniversary wishes! Woooo hoooo it’s been a year. Here’s to many, many more!!!”