Kostamos Yiacoumis was born on August 9, 1984 in Nea Halkidona-Athens, Greece. At the age of 7, he started his musical education by taking piano lessons. While he did not finish his piano studies, the fire of music was now burning strong inside him, and at the age of 15 Kostamos decided to study drums.
Kostamos began his professional career as a drummer in 2005 and collaborated with several notable Greek musicians and singer-songwriters such as Kostas Chronopoulos, Vox, Giannis Markopoulos, Manos Xidous, No Balance, Teresa Panagiotopoulos, Nikos Georgousakis / M51, KARMA, and The Secret.
He began teaching drums at Handrou Conservatory in 2007, as well as giving private lessons.
In 2010, Kostamos helped form the band The Secret, which was selected to participate in the “EUROVOICE” contest. After several weeks of audience voting, The Secret were named the winners and their song “In the Arms of an Angel” was featured in the televised finale.