Giving thanks for cuteness!

Jewel and husband Ty Murray just celebrated their very first Thanksgiving with son Kase Townes, who was born in July.

And the singer, 37, showed fans just how big -- and adorable! -- her special guy has become in just four months.

"Thought I'd share a pic of the baby taken on Thanksgiving," the Platinum Hit star wrote on her WhoSay Page. "He is the happiest baby!"

Indeed, in the candid snapshot, Jewel holds up Kase (whose daddy Murray is a rodeo star) as he grins and giggles from ear to ear in a long-sleeve T-shirt, khaki dungarees and boots.

The Texas tot (his family lives on a sprawling ranch in in the Lone Star state) weighed 7 lbs., 6 oz. at birth.

"I hit the baby lotto," the first-time mom said on the Today Show in October. "He's just a really sweet, easy-going little baby. I'm so lucky."