The former Oasis frontman, who headlined the Friday night of the music event, shared a photo of his bruised and cut face on Twitter.
Gallagher compared himself to the late The Who drummer Keith Moon, who was infamous for his wild behaviour.
The 48-year-old also joked that the image could feature on the cover of his next solo album.
The singer tweeted: "So check this out I fell out the helicopter last night you couldn't rite it all good who said RnR is dead Keith moon eat your drum skin out C'mon you know LG x"
