These "A Cappella" videos are becoming staples of Fallon's "Tonight Show," and this holiday version of McCartney's classic (complete with animated characters) is a welcome addition.
Matthew McConaughey stars in "Sing" as the voice of koala Buster Moon, who produces a greatest singing competition to try and save his theater. McC was a main guest of last night's show, doing some Kid Theater (another Fallon classic) and sharing his holiday plans -- including a family trip to Brazil.
"Sing" opens Dec. 21, aka today, and McConaughey's other movie, "Gold," opens Christmas Day.
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