It's going to be a close call for the #1,#2 and #3 positions on the T40 chart this week.  Currently, Fifth Harmony's "Work From Home" f/Ty Dolla $ign (SYCO/Epic) is sitting at #1, followed closely at #2 by The Chainsmokers' "Don't Let Me Down" f/Daya (Disruptor/Columbia). But sneaking up very quickly behind is this week's Greatest Gainer, Justin Timberlake's "Can't Stop The Feeling" (RCA).  YMCMB/Republic's Drake joins the Top 5 with "One Dance" f/Wizkid & Kyla and label mate Ariana Grande moves up to #6 with "Dangerous Woman." Calvin Harris' "This Is What You Came For" f/Rihanna (Columbia) moves up a notch to #9. And charting this week will be RCA's ZAYN with "Like I Would."