Guns N' Roses: Coachella Goes Wild

It was all about Guns N' Roses Saturday at Coachella ... clearly the highlight of the festival.

Axl and the boys slayed with "Sweet Child O' Mine," and went on for an astounding 3 hours ... well, a skosh shy of 3 hours.

Axl was confined to his throne -- courtesy of fellow broken-legger Dave Grohl -- but midway through their set he brought on Angus Young, telling the crowd someone needed to jump around the stage.

BTW ... AC/DC announced Axl will be their lead singer for their world tour, because Brian Johnson was in such bad shape hearing-wise he was afraid he'd go deaf on the road.