Hammer was on Okay FM for an interview when Kwaw Kese banged into the studio to shower him with three bottles of champagne.
Hammer is known for discovering and producing many hit tracks for Kwaw Kese and to show appreciation for all the good job done, Kwaw surprised his boss on his birthday.
Hammer, who is known in real life as Edward Nana Poku Osei clocked another year yesterday, October 14.
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On the same day, the producer was hosted on Abeiku Santana's "Ekwan So Dwodwo" programme on Accra based Okay FM when Kwaw Kese banged into the studio to shower him with three bottles of champagne.
Check out photos from the memorable event in the gallery above.