Band and 'Late Late Show' host also team for "Us Against the World" at Pasadena, California gig
Chris Martin pays homage to Petty by leading sing-along at Portland arena show
Usher, Hugh Jackman, Forest Whitaker also praise socially conscious festival in 'Louder Together'
Singer also strips down "Hymn for the Weekend" during solo visit for BBC Radio 1's Live Lounge
Band debuts "one-off" tribute days after being forced to cancel show in deluged city
Singer performed solo piano rendition of nu-metal hit during tour kickoff in East Rutherford, New Jersey
Rapper Big Sean assists on track from band's 'Kaleidoscope' EP
Fan plays harmonica onstage while Chris Martin improvises song about Dublin
"By 2030, 800 million – that's half of the young people of the world – will drop out of school," Shakira warns at Hamburg, Germany fest
Proceeds from the song will benefit the Migrant Offshore Aid Station
Song hails from forthcoming 'Kaleidoscope' EP
Singers lead stadium-sized sing-along of "Don't Look Back in Anger"
'Dangerous Woman' singer will be joined by Justin Bieber, Katy Perry, Coldplay at June 4th show
John Legend, Salma Hayek and Julia Roberts also sign open letter to mark "critical moment in history" for women
Band announced 'Kaleidoscope' EP will come out June 2nd