5. Bruno Mars
His biggest hit: “Just The Way You Are”
Stats: 5.81+ million US, 12.5 million worldwide
Biggest hit he wrote: Cee Lo Green’s “F*ck You”
Stats: 6.03+ million US
*Editor’s Note: Condolences to Bruno Mars during his time of loss. And worldwide his biggest single outsold CeeLo’s, but domestically CeeLo trumped.