Coldplay at Glastonbury: Bee Gees' Barry Gibb and Chris Martin perform 'Stayin' Alive'

The pair also performed another of the Bee Gees' classic tunes, 'To Love Somebody'

Coldplay perform on the Pyramid Stage on Sunday night of Glastonbury Festival (Rex Features)

Coldplay frontman Chris Martin promised he'd have something special up his sleeve for the Pyramid Stage crowd. And, boy, did he deliver.

The band welcomed on to the stage the legendary former Bee Gees member Barry Gibb; delivering a double-whammy of tunes from the classic band. First up, a melodic rendition of "To Love Somebody".

Followed by the iconic tune, "Stayin' Alive"; which inevitably had the entire crowd going wild, and dancing their cares away in the muddy chaos of the Glastonbury fields.

It was certainly a surprise for the crowd; as Gibb had previously pulled out of his guest spot alongside Coldplay due to a close family member falling ill. The former Bee Gees member is a good friend of Martin and of the band, and had previously expressed a great amount of disappointment at having to cancel the appearance.

Interestingly, Rihanna had been heavily rumoured to appear as a replacement guest for the headlining slot; having appeared as a guest vocalist on the 2012 track, "Princess of China".

Elsewhere, the band opened their set with the stirring speech from Charlie Chaplin's 1940 film, The Great Dictator; as Martin jokingly thanked the crowd for surviving the "collapse of the country".