There are 2 artists named Peter Nagy:
 A Slovak singer, songwriter. Known from the 80s band Indigo who started his solo career later. Used to be very popular in former Czechoslovakia. In the 90s his most successfull projects were albums with childrens. Some of tham started their own singing career (although of no longitude). In recent years he is also active as photographer, many would argue that with far less success.
 A Hungarian pianist. Read more on Last.fm