Listen: 5 Seconds Of Summer's new song 'Want You Back'.

5 Seconds Of Summer have returned with new song 'Want You Back', their first new single in nearly two years, and the first taste of new music from the band's forthcoming third album.

About their new song, the band says: "Finally… It’s been 3 years since our last album and we are so ready to share new music with the world. After spending the last 5 years on the road since the age of 16, it was important we took time to reflect as individuals and now we’re coming back stronger and more unified than ever.  These songs mean the world to us and we have held nothing back in writing and recording this album.  We’ve been rehearsing a lot of the new songs live and can’t wait to get back out on tour to connect with our incredible fans."

Listen to the new song below...