ARIANA GRANDE treated her team to a Wicked night out ... Witch — hired out The Aubrey in London’s Knightsbridge for a party, where she picked up the entire tab that came to more than £6,000!
And Ariana Grande turned to her boyfriend Ethan Slater ... Her pale pink satin Schiaparelli corset dress — which is listed on the fashion house's website for around $7,100 — lit up the night.