Katy Perry has vowed to still be a pop star when she's grey and old.

The 38-year-old singer told Gwyneth Paltrow on her 'goop' podcast: "I wanna be a grandma pop star. You don't see a lot of grandmas or grandpas in my field, but I'm going to be one of them. I wanna do it for my daughter, for my family, my partner. A lot of people don't get out alive in both our businesses."