WATCH 5H PERFORM "THEY DON'T KNOW ABOUT US":
So naturally, we just couldn't resist the opportunity. M put together 9 super important reasons why the girls of 5H and the guys of 1D need to get in the recording studio and do their thing ASAP. After all, each groups' journey comes full circle when they meet up and record an awesome hit! Right?!
Click through the gallery to see all the reasons, then tell us by commenting below: What are your thoughts on these two groups collaborating?