It was an exciting week with four superstar acts launching new songs at Rhythm radio. Macklemore & Ryan Lewis' “Downtown” (Warner Bros.) takes home the top honors with 43 adds, with Drake's “Hotline Bling” (YMCMB/Republic) not far behind with 37. RBMG/Def Jam’s campaign for Justin Bieber's “What Do You Mean?” comes in with 31 adds, and Republic/YMCMB powerhouse Nicki Minaj nabs 23 for “Trini Dem Girls." Latium/RCA’s Shy Carter has a nice impact week with 9 commitments on “Bring It Back."