Extranea

In Extranea, each square contains the correct letter and two extraneous letters. What Christmas song is this? 

It's Grandma Got Run Over By a Reindeer:

If you're stuck, do hit the Hint button as often as you need to. Each time you do, one of the correct letters will be locked in place.

Extranea players help the game GROW. You can add your own categories about any subject that interests you! Players everywhere can play the puzzles you create.