Four young gentleman from Australia decided to make a band, post YouTube videos of them covering songs and became successful in the pop rock-punk industry. They became so successful that they got their own headlining tour. Their name? 5 Seconds of Summer.
Now, in Canada, four young ladies also decided to make a pop rock-punk band and gathered some popularity on YouTube. 5 Seconds of Summer found them on the Internet and asked if they wanted to be apart of their tour as their opening act.
It just so happens, they said yes.
It also just happens that the girls become very good friends with the boys.
Well, maybe a little more than "very good". Maybe more along the lines of "wow, I feel like a strong attraction to these guys in certain ways".
But that would be too obvious and cliché'd now, wouldn't it?
So let's just say that 5SOS and TWL's lives are gonna change in some sort of way during their time together, mkay?