Yesterday, 5SOS posted a pic of Calum, shirtless, holding a bottle of champagne (on a pink bike, go figure), with the tweet: "How we celebrate a number 1 hahaha." 5SOS has hit number one on the U.S. Billboard Charts and yeah, they're pretty dang excited about it.
Calum later tweeted: "Feels so good to be back on the bus :) I can be naked in my bunk and no one will ever know. Cal."
Now we ALL know, Cal.
Today, they shared a pic celebrating the big album news, tweeting: "You guys did this :) x"
You guys did this :) x pic.twitter.com/rc58hpKQvz- 5 Seconds of Summer (@5SOS) August 7, 2014