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Watch John Legend and Chrissy Teigen serenade baby Luna

by Randee Dawn / / Source: TODAY

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Music runs all through the household of John Legend and Chrissy Teigen, which means their 4-month-old daughter Luna is one lucky little lady!

Just check out this sweet home video of the Grammy- and Oscar-winning Legend playing a familiar tune on the household piano while Teigen tries to sing along and bounce a rapt baby Luna on one hip.

MORE: Chrissy Teigen's mom shares adorable new photos of baby Luna

But are we hearing right? Has Christmas come early?

Yep, the tune that's so familiar ... it's "O Tannenbaum" (also known as "O Christmas Tree")!

Well, you can't fault parents for getting excited. After all, this will be little Luna's first end-of-year holiday season. Which leaves us wondering: What will Santa bring little Luna? A baby grand perhaps?

MORE: Chrissy Teigen reveals the most surprising thing about being a new mom

We'll just have to wait and see!

Follow Randee Dawn on Twitter.

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