We're counting down the 25 Greatest Pop Stars of the 21st Century, and taking No. 4 is Drake. The rapper has topped Billboard's charts numerous amount of times. Keep watching to see how he dominated the Hot 100,

Our new GPS21C episode covers an artist who changed the direction of hip-hop and pop with his decade-plus of dominance.

Drake emerged from unlikely roots in the late '00s to become the biggest rapper of the 2010s -- which, by the time his decade was done, had become the same thing as being the 2010s' biggest pop star.