Osabuohien Osaretin, better known by his stage name Sarz, is a Nigerian record producer and musician. Born in Benin City, Edo State, he is known for the Sarz On The Beat / "Really" tag, at the beginning or end of all his musical productions.

Sarz’s love for music began in his childhood with the influence of legendary American producer Timberland. He sold his first beat at just fifteen years old and was catapulted into the mainstream after his production for Lord of Ajasa’s “See Drama”. Producing “Bi Chicken” for Reminisce saw a turning point in his career when the song became one of the biggest African street songs of 2011.