Peter Ries (also known as Marc Cassandra, Gilbert or Steve Hall) is a German record producer, composer, arranger and remixer. Ries started his career as a singer in 1980 under the nickname Gilbert. Following collaborations with Sandra and Sally Oldfield, he produced singles with 'N Sync, Kylie Minogue, Love Inc., Eros Ramazzotti, the No Angels, Bro'Sis, Joana Zimmer, Thomas Anders, Xavier Naidoo, Kool & the Gang, Mr.