From hugs with Ariana to Snapchats with Niall, Katy reveals her journey from dressing room to stage.
On 4th June 2017, Ariana Grande managed to get some of the world's biggest musicians to perform a benefit concert for victims of the Manchester Arena bombing the previous month.
Among the huge artists taking to the stage was pop legen Katy Perry, who's captured some of her backstage moments in an exclusive video.
From a hug with Little Mix's Perrie being interrupted by Justin Bieber, to catching up with Miley Cyrus in a hallway and even capturing a cheeky Snapchat with Niall Horan, hit play on the video above to watch Katy's journey from make-up chair to centre stage.
Following the terrorist attack at the Ariana Grande concert on 22nd May, her single 'One Last Time' re-entered the Big Top 40 chart at no.2, over 2 years since its original release as a tribute to the 22 people who lost their lives. Later, Ariana would release a cover of 'Somewhere Over The Rainbow' recorded at One Love Manchester to raise further funds for the victims and their families, which entered the chart at no.8.