Perry wore a series of high-fashion looks during her 72-hour live stream promoting her new album.
Money raised will go to the We Love Manchester Emergency Fund for the victims.
The footwear designer said fans will see her ‘boldest stage ever’ in her new Witness tour.
“I tried to talk to her about it, and she wouldn’t speak to me,” Perry revealed.
The pop star was among the performers at the concert.
Maroon 5, Miley Cyrus, Backstreet Boys and more will step out in style.
Innovation Team artist Isaac Toonkel found inspiration in “Fashion’s Biggest Night Out.”
The star cheekily posed for photographers with a “Privacy Please” sign from a hotel room door.
The co-chair is wearing custom Maison Margiela.