The holiday season is the time when mailboxes become flooded with greeting cards from relatives and friends all over the world.

Celebrities participate in these kinds of traditions as well, sending cards to family, friends and fans. Using social media, they share their holiday greetings online.

Some celebrities have even made their greeting cards a yearly tradition. The Kardashian family is known for putting out glamorous holiday cards featuring members of their family each year, though their 2013 Christmas card has sparked more controversy than past ones.

One celebrity couple who can always be counted on for adding a little humor to their holiday greetings is Fergie and Josh Duhamel. They share funny snapshots of themselves in ridiculous costumes or with their heads posed over cartoonish bodies every year. Though a Christmas card has yet to be posted on either star's social media accounts, they did include new son Axl in their Thanksgiving card festivities this year.

Another new celebrity couple participating in the tradition of sharing holiday greetings with fans this year is Kelly and Brandon Blackstock, who married in October and are expecting their first child together next year. The newlywed couple posted their card featuring Brandon's two children from his previous marriage with all four of them wrapped up together in a red bow. The card is part of a promotional contest for fans who want to win free autographed copies of her Wrapped In Red Christmas album.

Scroll through the gallery Enstars compiled of celebrity holiday cards to see the greetings your favorite celebrities have shared with their fans over the years.