Who is the composer of the studio album "on the rock" and a Grammy award winner?
On the Rock On the Rock is the 20th studio album by Argentine singer-songwriter Andrés Calamaro, released on June 1, 2010.
Robert Lopez Robert Lopez (born February 23, 1975) is an American songwriter of musicals, best known for co-creating "The Book of Mormon" and "Avenue Q", and for composing the songs featured in the Disney animated film "Frozen". He is the youngest of only twelve people who have won an Emmy, a Grammy, an Oscar and a Tony Award, and the quickest (10 years) to win all four.