We have a new #1 this week with Lukas Graham's "7 Years" (Warner Bros.) which vaults up to the top spot from #3. The Chainsmokers' "Don't Let Me Down" f/Daya (Disruptor/Columbia) joins the Top 5 this week while Ariana Grande's "Dangerous Woman" (Republic) moves up into the Top Ten, to #7. Drake's "One Dance" f/Wizkid & Kyla (YMCMB/Republic) rises from #13 to #9. This week's Greatest Gainer is definitely Justin Timberlake's "Can't Stop The Feeling" (RCA) which leaps halfway up the T40 chart to land at #11— with the potential to end up in the Top Ten after weekend spins are factored in. Calvin Harris' "This Is What You Came For" f/Rihanna (Columbia) is also on fire, jumping six spots up to #17. Looking to join the chart this week is Belly's "Might Not" f/The Weeknd (CP/RocNation/Republic) and Timeflies' "Once In A While" (Forty8Fifty/Epic).