Def Jam, the iconic record label, ROSE to fame under the visionary leadership of Lyor Cohen and Russell Simmons, alongside Rick Rubin. It revolutionized hip-hop, influencing Warner Music Group's reinvention. Def Jam launched 300 Records and reimagined YouTube Music's Blueprint. However, it later lost control of hip-hop's direction, illustrating the challenges of maintaining influence in a rapidly evolving industry.