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/ Source: TODAY
By Randee Dawn

What could be better than hearing one amazing singer tooling around town with "The Late Late Show's" James Corden?

How about over a dozen singers?

RELATED: From Adele to Michelle Obama: 7 of our favorite Carpool Karaoke segments

OK, they didn't all fit into his car at once, but in a new Holiday Carpool Karaoke special video viewers were in for a totally delightful treat, as singers ranging from Adele to Mariah Carey, Elton John to Selena Gomez all came together for a shared version of Carey's holiday hit "All I Want for Christmas."

Of course, it was all kicked off by Carey herself in a car packed with wrapped gifts, in a shimmery outfit. Corden asked her what she wanted for Christmas, and her answer was, "I want you to sing my song."

We went gaga for this video!The Late Late Show with James Corden

It's clearly a production that's been a whole year in the making, featuring clips from the great Carpool Karaoke clips over the past months and simultaneously giving us on a retrospective of one of all time favorite late night segments.

RELATED: Bruno Mars gets funky — and takes on Elvis — with James Corden in Carpool Karaoke

What a wonderful present! We're definitely not returning this one. Thanks, James and Mariah and everybody!

Follow Randee Dawn on Twitter.