Barack Obama, Justin Bieber, Miley Cyrus + More in Celebrity Tweets of the Day

Most of your favorite celebs are still celebrating America's birthday today (July 5), but plenty of them still got down to business where it matters: Twitter. Because the truly famous never take a vacation from 140-character missives on everything from selfies to silly advice.

Nicki Minaj made a splash just with the simple announcement that she joined Instagram.

Miley Cyrus addressed Jay-Z's diss in an either oblivious or tongue-in-cheek (or in her case, perpetually sticking out) way:

Justin Bieber reminds us that he and Selena Gomez are back together with a cryptic tweet from the most recent night they were snapped cuddling:

Chris Colfer is proud of how much his fish has grown up:

Judah Friedlander knows the true meaning of patriotism:

Colin Quinn offers deliberately trite tips on how to beat the heat:

President Barack Obama is having more fun right now than you are: