The Pretty Little Liars star opted for a pug-themed onesie the night before the big holiday, first showing off her outfit to fans with a selfie.
"Merry Christmas Eve. Oh the things I find online," she captioned the snap on Instagram, which showed her posing in front of a Christmas tree with hood of the onesie pulled over her head.
Lucy followed up that tease with a photo that revealed more of what her pajamas looked like, posting a body shot of herself as she gave her family pup a piggyback ride. "Jacks got my back," she wrote alongside the pic.
As if that wasn't festive enough, the country crooner and her family got all dressed up on Christmas day in an awesome set of red Home Alone-themed Christmas sweaters that read, "Merry Christmas Ya Filthy Animal."
"Merry Christmas to all of you from my family to yours!," Lucy captioned the shot. And since it's clear she has a thing for dogs, her brother in law made sure that reflected in the gift that he gave her. "Pretty sure my bro in law gave me this as a joke. Little does he know ...this is wardrobe GOLD. I will be wearing this everywhere," she wrote alongside a pic of herself wearing a t-shirt with Jacks' face on it.