Oh, bored Google developers. Always going bananas with the holiday-themed Easter eggs.

So, why would this Yuletide season be any different? Of course, it isn't.

If smartphone users conduct a Google search for "let's go caroling," your phone will transform into a Christmas karaoke machine!

The Easter egg works on both Android and iOS (but not with Internet Explorer on a Windows Phone--someone is grinching somewhere).

For non-WP-ers, there is a momentary delay for it to pop, but you'll receive a pull-down menu asking "Which carol would you like to sing?" with options for five holiday classics.

Clicking one will slide open a window that will allow users to prompt a cheesy musical accompaniment along with a highlighted real-time lyrics.

Caroling options include "Jingle Bells," Up on the House Top," "Deck the Halls," "O Christmas Tree," and "We Wish You a Merry Christmas."

It's probably a safe bet that right now some Google developers are plotting hidden gems for New Years.