A PREVIEW OF RADIO CHART PREVIEWS

As we head into a long holiday weekend traditionally featuring countdowns and party mixes, the Top 10 at T40 will remain fairly still, but Luis Fonsi & Daddy Yankee's "Despacito" f/Justin Bieber (UMLE/RBMG/DefJam/Republic) is the week's Greatest Gainer and leaps up to #11, while Sam Hunt (MCA Nashville/Capitol) continues his crossover, moving into the Top 30 with "Body Like A Back Road."

At Rhythm, Kendrick Lamar holds the top spot again with "HUMBLE" (TDE/Interscope) and the battle will be on between Calvin Harris' "Slide" f/ Frank Ocean & Migos (Columbia) and Future's "Mask Off" (Freebandz/Epic), who earlier this week dropped a remix to the song featuring Kendrick, for the next #1.

And at Modern Rock, Imagine Dragons' "Believer" (KidinaKorner) will remain #1 for a ninth week, as Portugal The Man's "Feel It Still" (Atlantic) shoots to #3 with a 250+ spin gain and could be a new challenger for the top spot soon.

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