Dr. Dre Nas' "Hustlers", and several beats on Eminem's Relapse album. Soul and R&B pianist Mark Batson, having previously worked with The Dave Matthews Band, Seal and Maroon 5 has been credited as the architect of this sound. Besides Batson, Aftermath producer and understudy of Dre's, Dawaun Parker, who has named Q-Tip and J Dilla as his primary influences, is thought to be responsible for giving Dre's newest beats an East Coast feel. Dr. Dre has said that his primary instrument in the studio is the Akai MPC3000, a drum machine and sampler, and that he often uses as many as four
Dr. Dre such hit songs that year as "Family Affair" by Mary J. Blige. "Rolling Stone" magazine thus named him the second highest-paid artist of the year. Dr. Dre was ranked 44th in 2004 from earnings of $11.4 million, primarily from production royalties from such projects as albums from G-Unit and D12 and the single "Rich Girl" by singer Gwen Stefani and rapper Eve. Forbes estimated his net worth at US$270 million in 2012. The same publication later reported that he acquired US$110 million via his various endeavors in 2012, making him the highest–paid artist of the year. Income from the 2014