Watch: The 1975 debut new song 'I'm In Love With You' live.

The 1975 have made their return to live shows, performing at Summer Sonic festival in Japan this past weekend - their set including a brand new song; 'I'm In Love With You', as well as the live debuts of 'Happiness' and 'Tonight (I Wish I Was Your Boy)'.

Watch fan-filmed videos of the festivities below...