We'd like to bow down to the person who made this mashup a reality, as "Kiss You" and "She Looks So Perfect" seem to go together so well. It's like they were made for each other.
Now that we know how magical 1D and 5SOS sound together, how about they all collaborate on a massive tune? C'mon, guys. Think of the fans.
Oh, and all other mashups can go home. Take a listen: