Today's Official Charts Midweek Sales Flash is in.

I Took A Pill In Ibiza is still No.1 in today's midweeks, on sales of 30,680 - but it has a new challenger as Sia's Cheap Thrills moves 4-2 (24,440 sales). Dropping a place is Work From Home by Fifth Harmony (feat. Ty Dolla Sign), as it appears at No.3 after shifting 22,879. Lukas Graham's 7 Years also dips 3-4 on sales of 20,613, while Lush Life by Zara Larsson rounds out the Top 5 ...