A devoted tech fan, Dr Dre took the plunge back in 2008 by launching his own brand of headphones.
Designed for maximum sonic impact, the sleek demeanour of Beats by Dre soon saw the headphone become a market leader.
Created by Dr Dre and Interscope boss Jimmy Lovine, the range has grown to become a globally recognised brand.
Well, Apple are close to completing a takeover deal which could see Beats bought for some $3.2 billion.
If true, this could well turn Dr Dre into rap's first billionaire...