'Roar' superstar Katy Perry has revealed that her mother is a complete 'health nut' and can be credited with instilling the importance of eating well within her. 

She told BBC Radio 1 presenter Nick Grimshaw that she knows that it's vital to put good things into her body especially when her schedule is so busy as she needs to stay in the best possible health:

"My mom's a health nut, but I think I feel very clear and healthy because of it."

Perry continued: "My mom always pumped vitamins into me, she always has from day one, and all kinds of juices and blends and stuff like that. I mean when you're on tour [I have to be] especially [healthy] yes."

Meanwhile, she sat down with 'Good Morning America' earlier this morning to talk about her collaboration with partner John Mayer (pictured below) on the track 'Who You Love' and explained that getting together was very ordinary:

"We just went to dinner like a regular couple. We shared music as a love, together, that's like a common interest... so..."