Taylor Swift
Taylor was even seen playing air guitar to the track while attending the men's singles final.
Her Eras tour shows include an incredible 16 outfit changes.
"We have engaged our legal team to initiate proceedings..."
The music mogul and singer have been embroiled in a very public dispute for years.
One song on Charli's latest album Brat has been widely interpreted to be about the 14-time Grammy winner.
The chart-topping star said the saga "filled me with a new sense of fear" as well as "a tremendous amount of guilt".
"He has just a natural gift of being able to perform in front of people."
The I Can Do It With A Broken Heart music video takes Swifties behind the scenes of the mammoth world tour.
The Fortnight singer made sure she closed the European leg of her world tour in style.
The Grammy winner previously said she was "completely in shock" about the fatal stabbing.