Tweet a pic of your pre-washed, pre-brushed, post-sleep, messy "bed head" to @RobinMeade (or just reply to this tweet) and make sure to use the hashtag #BedHead.

We're celebrating the fact that seven years ago, the very first tweet went out to the world. Not surprisingly, it probably looks a lot like YOUR first tweet:

just setting up my twttr

— Jack Dorsey (@jack) March 21, 2006

Jack Dorsey (@Jack) is widely considered to be the creator of Twitter (though in his profile he describes himself as, "A sailor, a tailor").

You can find out what YOUR first tweet looked like by using a site like MyTweet16 which will scroll back through your account and show you your earliest tweets.

Not many people saw Dorsey's tweet when it first went out because Twitter wasn't publicly introduced until four months later. Even then, it didn't really take off until the SXSW festival in Austin, Texas, the following year.

But now, just seven years after that first humble tweet, the company serves more than 500 million users who send out 55 million tweets per day!

Celebs like Lady Gaga (@LadyGaga), Katy Perry (@KatyPerry), Ellen DeGeneres (@TheEllenShow), Justin Timberlake (@jtimberlake), notables like the president of the United States (@barackobama) and even CNN (@CNN) have direct lines to millions of fans and followers through Twitter. But none is as powerful in the twitterverse as Justin Bieber (@JustinBieber). The Biebs commands more than 36 million 'beliebers' who cause the pop star to pop into the top trends on a regular basis (Hey Biebs -- tweet us a #BedHead pic will ya?).

Your Morning Express crew has also jumped on the bandwagon: Anchor Robin Meade (@RobinMeade), meteorologist Bob Van Dillen (@BobVanDillen), personal finance anchor Jennifer Westhoven (@JenWesthoven) and sports anchor Carlos Diaz (@CarlosHLN) are all on Twitter -- and they've all tweeted their #BedHead pics!

So help us celebrate this auspicious occasion. On the seventh anniversary of the first tweet, make your first tweet of the day a picture of your messy noggin sent to @RobinMeade -- and be sure to use the hashtag #BedHead! We'll put some of our favorites on HLN!

Morning Express with Robin Meade airs Monday through Friday at 6 a.m. ET on HLN.  Like the show on Facebook, follow on Twitter: @MorningExp.