Nas is a musician.
Nas . In 2012 , The Source ranked him number two on their list of the `` Top 50 Lyricists of All Time '' . About.com ranked him first on their list of the `` 50 Greatest MCs of All Time '' in 2014 , and a year later , Nas was featured on `` The 10 Best Rappers of All Time '' list by Billboard .