Beyoncé to sing with Gwyneth and Jay Z?

The star is rumoured to be collaborating with friend and husband at Glastonbury.

Beyoncé is said to be planning some special duets for her headline show at the festival on June 26th.

Gwyneth Paltrow, her husband, Coldplay frontman Chris Martin and Jay-Z are all rumoured to be appearing on stage with the "Single Ladies" star.

Beyoncé has already worked with her husband several times, most famously on single "Crazy In Love".

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