Singers lead stadium-sized sing-along of "Don't Look Back in Anger"
50 more injured as suspected suicide bomber targets concertgoers
Singer also shares all-star track list for 'Dangerous Woman,' featuring Nicki Minaj, Future and more
Global Festival curator Chris Martin also appears during Ed Sheeran's set to sing "Thinking Out Loud"
Bruno Mars, Ariana Grande, Camila Cabello, Ed Sheeran, Taylor Swift also earned multiple nods