The pop stars are said to be "fans of each other"
A recent ruling found that Perry hadn't copied music for 'Dark Horse'
The ruling brings an end to the eight-year trial against the pop-star
Her performance included some backing dancers dressed as phallic-like mushrooms
The pop star is bringing a slice of her current Las Vegas residency to the show next week
To say it was over the top would be an understatement
It comes ahead of Perry’s Las Vegas residency
Adele, Katy Perry and John Legend have all recently signed up for residencies
It's full of bangers
It's set to arrive on the same day her Vegas residency kicks off