Mariah Carey, Jimmy Fallon and the Roots deliver ‘Late Night’ joy

Sometimes words are unnecessary, so skip the rest of this paragraph and click above for instant joy. The messengers? Jimmy Fallon, Mariah Carey and the Roots, who got together prior to Carey’s appearance on “Late Night with Jimmy Fallon� to do a version of “All I Want for Christmas Is You.� The version is wonderful, and will light up the blackened hearts of the Grinchiest souls.

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