Over 80 people were killed in the attack eight years ago
The Queen of Pop recently kicked off her greatest hits tour at The O2 in London
"We are working on the line-up day and night at the moment, but it’s still changing every day"
Dua Lipa and Coldplay are also reportedly set to headline
Including tracks by Megan Thee Stallion and Remi Wolf
The pair have previously been engaged in various feuds
It comes after Madonna used old interview clips of Cher in her ongoing tour dates
"My mother, god bless her, she must be watching over me, she said, 'Girl, it's not your time to go'"
"Each and every one of you have the power and ability to turn light on in the world"
"I hope that you hear the humanness of the vocal coming across"