As well as a leopard print catsuit, Jessie wore a hat featuring little pussycat ears while singing from her troon at the gig.
"The Big Chill was HOT! Thank u for going iinnnn even in the rain!!! " Jessie tweeted.
"Amazing toon @kanyewest was a honour to open for you.
"Visuals, songs, performance wow! :) #thebigchill "