The Grenade singer watched the late Rehab singer rise to fame and realised that she did everything with her career that he wanted to do.
He said: "I felt like everything I've been saying, everything I wanted to do, she did it. It was one of those things like, 'Damn it! Damn it!' It was perfect."
Bruno said he loved the fact that Amy's music couldn't be "pigeon-holed".
He said: "You couldn't put it in a box 'cause it could be played on rock stations, it could be played on rhythmic stations, it could be played on pop radio, and I've always wanted to make music like that - that could be spread out, and can't be pigeon-holed to one thing. And they did it. Her and Mark Ronson."
Bruno, 27, has his own new album Unorthodox Jukebox out, which features Mark.
"(I was) not thinking about business or radio or politics, just doing what I love to do and that's creating music," he said. "Whether it be a reggae song, rock song, a love song, the main thing was just to, whatever I was feeling, to try to capture that emotion."