Luis Fonsi & Daddy Yankee's "Despacito" f/Justin Bieber (UMLE/RBMG/DefJam/Republic) took the Top 10 by storm this week, leaping from #9 to #3 in a show of huge momentum. Camila Cabello's "Crying In The Club" (Syco/Epic) and Charlie Puth's "Attention" (Atlantic) join the Top 20. The Greatest Gainer this week will be another song featuring Justin Bieber— David Guetta's "2U" (Atlantic-Def Jam), which comes screaming on the chart with the potential to wind up in the Top 20 with less than a week of airplay. Liam Payne's "Strip That Down" f/Quavo (Republic) moves Top 25 while Glassnote's Childish Gambino joins the Top 30 with "Redbone." Also charting this week is Fifth Harmony's "Down" f/Gucci Mane (Syco/Epic), Bruno Mars' "Versace On The Floor" (Atlantic) and Logic's "1-800-273-8255" f/Alessia Cara & Khalid (Def Jam). Oh, and watch out because here comes the newly-released DJ Khaled single featuring Rihanna and Bryson Tiller called "Wild Thoughts" (We The Best/Epic) plus Calvin Harris' "Feels" f/Pharrell Williams, Katy Perry & Big Sean (Columbia). The battle for Song of the Summer is on!