Marilyn Manson has heaped praise on Lady GaGa calling her “smart” and a “great musician.”

The 40-year-old – real name Brian Warner – even told Rolling Stone that there GaGa is similar to himself in some aspects.

He enthused: "She knows exactly what she's doing. She's very smart, she's not selling out."

"She's a great musician, she's a great singer, and she's laughing when she's doing it, the same way that I am."

In other Marilyn Manson news, the rocker was at HMV on London's Oxford Street yesterday where he was signing copies of his new record 'The High End Of A Low'.

While posing for photographs, Marilyn Manson copped a feel of his bassist Twiggy Ramirez' testicles.

(by Scott Colothan)