Grandparents are the best, aren’t they? With their warm smiles and the best candy and the way they bent the rules, a trip to grandma’s house was always my favorite part of childhood. And it seems to be the same for Rumer Willis’s 2-year-old daughter Louetta “Lou.” The toddler was glowing with happiness during a recent phone call to her grandma Demi Moore, and the sweet video of the moment is pure joy.

“The sweetest birthday present from my little Lou!” The Substance star wrote on Instagram yesterday. “Thank you for all of the birthday wishes. ♥️🎂”

In the adorable video, Moore sits in the backseat of a car, holding up a small tablet with a FaceTime call with her only grandchild. “

“Happy BIRTHday to Yaya!” Lou sings to her “Yaya” grandma at the top of her lungs. “Happy birthday to youuu

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