Beyonce Knowles' close pals Gwyneth Paltrow and Chris Martin are planning a celebratory party after she headlines Glastonbury tonight (26.06.11).

The 'Halo' hitmaker will perform at the famous music festival in Somerset, South West England for the first time today and Gwyneth and husband Chris - who headlined with his band Coldplay last night (25.06.11) - are busy preparing the bash.

A source told the Sunday Mirror: "It's being held in a private Winnebago area before a select few head over to the nearby Babington House hotel.

"Gwyneth's made sure there's Cristal champagne and Belvedere vodka on tap for the guests."

It was revealed earlier this week that Chris was behind Beyonce's much hyped appearance at the festival.

Co-organiser Emily Eavis said: "Chris is a bit wary of people knowing he's been so involved. I don't know why because it's actually cool.

"Chris is as loyal as they come - he'll do anything for Glastonbury. He's really an unlikely frontman. Most people are a bit more all-consumed with their own thing."