The collaboration marks the first time that the three have joined forces
The surprise arena tour will kick off next week
The duo performed the track at Fred again..'s surprise NYC rave a few days ago
The news of Reading festival's sold-out date comes within 24 hours after the announcement of more than 50 new names being added to the line-up
Other acts joining the bill include Denzel Curry, Kenny Beats, Beabadoobee and more
G Flip also broke a record by having seven songs in this year’s Hottest 100, the most by one artist in one countdown
This year's ceremony is due to take place at London's O2 Arena in March
Pretty Lights, Fisher, Megan Thee Stallion, and more were also announced for the festival
Four Tet, Fontaines D.C., Louis Tomlinson, Big Thief and more will be joining - check out the full lineup here.
"I fuckin love Keem", said Fred