It’s too close to call for #1, but it is inevitable that Columbia’s Lil Nas X will be there this week or next with "Old Town Road." Mustard's “Pure Water” f/ Migos (QC/10S/Capitol-Interscope) climbs to #6, while 2 Chainz' “Rule The World” f/ Ariana Grande (Def Jam) enters the Top 10. Marshmello, Tyga & Chris Brown's “Light It Up” (Astralwerks/Capitol) will be up over 500 spins, and Chris Brown's “Wobble Up” (RCA) will have 400+ spin increase, plus debut. Others debuting include Daddy Yankee & Katy Perry's “Con Calma” f/ Snow (El Cartel/UMLE/Capitol) and DABABY's “Suge” (SCMG/Interscope).