As we head into the long holiday weekend, the Top 10 at Pop continues to be a log-jam situation and most of the big moves are happening down the chart. Luis Fonsi & Daddy Yankee's "Despacito" f/Justin Bieber (UMLE/RBMG/DefJam/Republic) is the week's Greatest Gainer, jumping up to #11 and poised to join the Top 10 soon. Shawn Mendes' "There's Nothing Holdin' Me Back" (Island/Republic) joins the Top 15. RCA's Miley Cyrus took a big jump and moves up inside the Top 25 with "Malibu." Sam Hunt (MCA Nashville/Capitol) makes the jump into the Top 30 with "Body Like A Back Road." And charting this week will be Camila Cabello's "Crying In The Club" (Syco/Epic), Liam Payne's "Strip That Down" f/Quavo (Republic) and Post Malone's "Congratulations" f/Quavo (Republic).