Have you heard this yet?!

A YouTube user has created a mashup of the ultimate duo: One Direction and 5 Seconds of Summer!

The song is a mix of 1D's Kiss You and 5SOS' hit "She Looks So Perfect." Would it be called "Kiss You Perfect?" "She Looks So Kissable?" Whatever, it doesn't matter, this song is SO GOOD!

It's getting us pumped to see both groups when they come to Philly on One Direction's tour in August!!

Listen to the song HERE and let us know what you think!