Hendra Samuel Simorangkir often known as Sammy Simorangkir is an Indonesian singer/ vocalist as well the former lead singer of pop band Kerispatih. His real breakthrough into pop music stardom came when he became the finalist at Indonesian Idol season 1. He quickly acquired popularity thanks to Sedang Apa dan Dimana (What you are doing and where?), Kesedihanku (My Sorrow) or album I’m Back. He was awarded Best male Solo single on RCTI’s music show Dahsyat.
Born to DN Simorangkir and Ida Tiur Simanjuntak, Sammy Simorangkir graduated from the Musicians Institute of Indonesia 's Department of Percussion. He became a member and soon turned into a vocalist of pop band Kerispatih where he together other members released Gulalikustik (2004), Honesty Heart, The Fact Feelings, etc.
Sammy Simorangkir was romantically linked to Nania Idol, models Andrea Dan & Nathalia.