Michael Collins Ajereh (born 26 November 1982), known professionally as Don Jazzy, is a Nigerian record producer. He founded the record label Mavin Records in 2012, for which he is chief executive officer (CEO) and has signed artists including D'Prince. Prior, he co-founded Mo' Hits Records with D'banj in 2004, and was an in-house producer for Kanye West's GOOD Music from 2011 to 2015.

Don Jazzy was born Michael Collins Ajereh in Umuahia, Abia State, on 26 November 1982, the son of Collins Enebeli Ajereh and Mrs Ajereh. His father is from Isoko in Delta State. His mother is an Igbo princess from Abia State and his father is a member of the Isoko people.

Ajereh's family moved to Ajegunle, Lagos, where Don Jazzy was raised. He was educated at the co-educational high school, Federal Government College Lagos. Don Jazzy found an interest in music early in life and at age 12, began to play the bass guitar and piano. He also gained knowledge of traditional and percussion instruments. Don Jazzy enrolled in business management and studied at the Ambrose Alli University, Ekpoma, Edo state.

In 2000, Jazzy's uncle invited him to play the drums for a local church in London and that was his first visit to London. Don Jazzy gained employment at McDonald's as a security guard. He continued his interest in music, associating with Solek, JJC Skillz, Kas, Jesse Jagz, The 419 Squad and D'Banj.

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