Alice Cooper has revealed that he gave Lady Gaga some helpful advice when they first met.

The pair have something of a mutual appreciation of each other's craft and the veteran shock rocker has covered Gaga in the past.

Speaking to Reader's Digest, Cooper said that he told Gaga to make sure that her on-stage persona was kept separate from her real character. He said:

"As soon as I saw her on TV, I fell in love with the outrage. I couldn't wait to see her show. Last year, we met backstage and she was wonderful. She got down on her knees and did the whole 'We're not worthy' bit from [the film] Wayne's World."

The 'School's Out' star continued: "She said, 'Alice, thank you for letting me steal your show'. I said, 'Gaga, I created a character called Alice. But it's important to keep Alice on stage. I never let Alice take over my real life'. I guess what I was trying to say was, be outrageous for the cameras. Wear a chicken on your head...but don't get suckered into thinking that stuff is real. When you're at home, just be yourself. If you can learn to co-exist with both Gagas, you'll be OK."