Who is the composer of the studio album "on the rock" and a Grammy award winner?
Andrés Calamaro Andrés Calamaro (Andrés Calamaro Masel, August 22, 1961), is an Argentine musician, composer and Latin Grammy winner. His former band "Los Rodríguez" was a major success in Spain in the 1990s. He is multi-instrumentalist and he became one of the main icons of the Argentine rock and has sold over 1.3 million copies.
Bob Rock Robert Jens Rock (born April 19, 1954) is a Canadian musician, sound engineer, and record producer best known for producing rock bands and music artists such as The Tragically Hip, Aerosmith, The Cult, Bon Jovi, Mötley Crüe, 311, Metallica, Our Lady Peace, Bryan Adams, The Offspring, Michael Bublé, Black Veil Brides, David Lee Roth and Ron Sexsmith.