The Cleveland Cavaliers have gone all out for Christmas -- turning up as cookies and donning a holiday onesie. The festive spirit also includes a team-sung version of "Winter Wonderland."

Let us serenade you on this festive day with a beautiful song… 🎶

— Cleveland Cavaliers (@cavs) December 25, 2015

Cavs fans must be hoping for a better performance against the Golden State Warriors.

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