Katy Perry has shared new track ‘Smile’, the titular effort from her upcoming fifth album.Describing her latest effort, Perry explained that she wrote it while battling “one of the darkest periods of my life”.“I wrote the title track from the album when I was coming through one of the darkest periods of my life and had lost my smile,” she wrote on Instagram.“This whole album is my journey towards the light – with stories of resilience, hope, and love.” Step right up! Step right up!