Michael Collins Ajereh (born 26 November 1982, Lagos State, originally from Delta), known as Don Jazzy, is a Nigerian record producer, singer-songwriter and musician. He has been the chief executive officer of Mo' Hits Records and is the current chief executive officer of Mavin Records. Ajereh has also produced tracks for Dr SID, Wande Coal, Emeka Infiniti, D'Prince, Darey, Naeto C, Olakunle Excel et Zanga, Sauce Kid, Ikechukwu and Tiwa Savage.
Ajereh was born in Lagos State. His family lived in Ajegunle, Lagos where Ajereh was raised. He was educated at the co-educational high school, Federal Government College Lagos. Ajereh found an interest in music early in life and at age 12, began to play the bass guitar. He also gained knowledge of traditional and percussion instruments. Ajareh enrolled in business management studies at the Ambrose Alli University, Ekpoma, Edo state.
In 2000, Ajereh visited London. His uncle had invited him to play the drums for the local church. In London, Ajereh gained employment at McDonalds and as a security guard. He continued his interest in music, associating with Solek, JJC, Kas, The 419 Squad and D'Banj. Ajereh learnt producing skills from Emeka Infiniti at O-Town record company.