Miranda Lambert Follows Gwen Stefani on Twitter and Catches Plenty of Her Holiday PDA with Blake Shelton

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Miranda Lambert is keeping tabs on her ex's new girlfriend.

The country superstar opted for a bold social media move on Christmas Eve, following Gwen Stefani's official Twitter account. So far, Stefani has not followed Lambert back -- but she's been busy.

The No Doubt singer spent her Christmas holiday with Lambert's ex, Blake Shelton, at his home in Oklahoma and on the sidelines of an Arizona Cardinals game.

WATCH: Gwen Stefani and Blake Shelton Take a 'Selfie Break' at Arizona Cardinals Game 

WATCH: Gwen Stefani and Blake Shelton Spend Christmas Together in Oklahoma - Get All the Details!

In a video posted to Twitter last week, Shelton adorably planted kisses on Stefani's cheek during what could have been a hunting excursion. The couple was decked head to toe in camouflage.

Stefani's ex, Gavin Rossdale, apparently celebrated a low-key Christmas this year, opting not to post anything on his social media accounts. For what it's worth, Stefani does still follow her ex-husband on Twitter.

Meanwhile, Lambert spent Christmas with her family and ignited a bit of a frenzy on social media. Sharing a photo of herself draped in her grandmother's fur coat, Lambert gushed about the family heirloom.

"My Nonny gave me two of her fur coats! I definitely know where I got my love for DIAMONDS, FUR and WHISKEY!" she captioned the image. In another shot, Lambert could be seen embracing her grandmother and showing off the embroidery inside the coat.

"Her name embroidered inside is priceless. A family heirloom I will cherish forever," she wrote. "I'm so thankful for her and all the things I have learned from her. Nonny is strong, beautiful, feisty and most of all, loving."

WATCH: PETA Reacts to Miranda Lambert's Fur Christmas Gift 

PETA wasted no time in responding, with the organization's vice president, Lisa Lange, telling ET: "We had higher hopes. Since Miranda rescues dogs, we always thought she could see that whether fur comes from a mink, a fox, or a dog or a cat in China, the source is always a gentle animal who did not want to die."

Lambert has been outspoken about her animal-loving ways over the years, founding a rescue organization called MUTT Nation and showing off her own mutts on Instagram.

Since divorcing in July, both Shelton and Lambert appear to each be moving on. Lambert opened up about the split for the first time in Cosmopolitan magazine, declaring: "We just need y'all to be supportive, and nobody pick a side -- because there ain't a side."

For more from her interview, watch the video below.