Photo: carrieunderwood/Instagram; Jason Kempin/Getty

Carrie Underwood

Carrie Underwoodis paying tribute to her dog Ace following his death on Sunday.

The singer, 39, shared a series of photos of her beloved pet, including a shot of her kissing his head, onInstagramMonday.

“Last night my sweet Ace left this world…he will forever live on in our hearts and be forever missed,“the Grammy winnercaptioned the images. “He was there for me when I was on my own trying to figure out life when it was at its craziest! He was with me through 3 houses, 6 tours and 2 kids…always ready to snuggle and play…through all the highs and lows.”

She added, “He was a true friend and a good boy till the very end. I love you, sweet Ace…see you on the other side…💔”

carrieunderwood/Instagram

carrie underwood

Underwood and her husbandMike Fisher— who share sons Isaiah, 7, and Jacob, 3 — attended theGrammyson Sunday night, where the singer performed her song “Ghost Story.”

Ace played an important role in Underwood’s wedding to Fisher in July 2010, serving as a ring bearer alongside Underwood’s nephew. The flower girl was responsible for holding Ace’s leash.

“He’ll be one of the ring bearers — he’s like my kid,” Underwood said before the wedding. “Ace is such a big part of my life.”

“Mike was like, ‘He’s in pink! What are you doing?’ " Underwood told PEOPLE at the time. “But he looked so handsome.”

“He needed a little bit of coaxing along the way, but he did great,” Fisher added. “It was cute — it was a cool moment. Everybody really loved it.”

source: people.com