Emily Shur/Atlantic RecordsThere'll be a few more voices singing carols around the National Christmas Tree in Washington, D.C. next week. 

Jason Mraz and The Fray have joined the lineup of the 90th annual National Christmas Tree Lighting ceremony, which takes place December 6.  They'll join previously announced performers Colbie Caillat, James Taylor, Babyface and American Idol champ Phillip Phillips, all of whom will be singing holiday favorites as the tree is illuminated. 

Additionally, Neil Patrick Harris will host the event, and Modern Family actor Rico Rodriguez will be on hand for the fun.

The festivities will be streamed live at TheNationalTree.org starting at 4:30 p.m ET that day.  The ceremony will also air nationally on public television throughout December -- check your local listings.

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