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."