Chrissy Teigen and John Legend's Sweet Serenade to Daughter Luna Will Melt Your Heart

The model and cookbook author hums along to "O' Christmas Tree" as her musical hubby tickles the ivories

Donato Sardella/Getty

When your dad is a Grammy- and Oscar-winning singer and songwriter, you get the best music at your disposal. And when your mom is a Lip Sync Battle guru, it’s the cherry on top.

Chrissy Teigen and John Legend composed a sweet music session for their 4-month-old daughter Luna recently, and made fans and followers jealous with envy when they shared the moment on Instagram Thursday.

In the video, Teigen, 30, hums along to “O’ Christmas Tree” as Legend, 37, tickles the ivories.

“The never-ending song,” the model captioned her clip. And judging by little Lulu’s face, the sing-along tunes are something she’s already accustomed to.

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The couple have been snap-happy ever since welcoming their first child in April. From capturing Luna’s growth on Instagram to chronicling everyday moments on Snapchat, Chrissy and John have shared their parenting skills with fans since day one.

“It’s just so much love, you feel that connection with your wife and with your daughter, and I think it’s a powerful thing to start building a family,” Legend told PEOPLE about fatherhood.

“[Luna] seems to be able to handle a lot of different environments because she’s traveled a lot with us already,” he added. “We’ve been to Italy, and to France and New York, and Mexico with her, and so she’s traveled quite a lot with us already.

“She’s been able to handle all that so hopefully we’re getting her prepared for the kind of life we live,” he continued.

— Karen Mizoguchi