Some people denying katy perry being a has been is just hilarious. Her last album which was a hit was back in 2013. Her last hit was dark horse back in 2013. Even roger waters, pink floyd member hosted a world tour which is bigger than any katy perry tour, that doesn't make him relevant in today's industry. He is legacy act. She is famous but that doesn't means she is relevant to today's scope of mainstream music. Celine dion new world tour is going to smash records but she is legacy act not current relevant act. Simple
Same for older movie stars. Today, likes of will Smith, julia roberts etc. Who are famous and known but not that relevant as big stars anymore.
That's why these are has beens. Simple
6