Lady GaGa, Damon Albarn To Play Secret Glastonbury Sets - EXCLUSIVE

Lady GaGa will play a secret set at the Glastonbury festival in the early hours of tomorrow morning, Gigwise can reveal.

The American singer will perform at Shangri-La at 12.30am, in addition to her set on the Pyramid Stage tomorrow afternoon (June 27).

Meanwhile, Blur's Damon Albarn will also perform at Shangri-La on Saturday with his Africa Express side-project.

Albarn will headline the festival on Sunday with Blur. The set will mark the group's biggest performance since their recent reformation.

As previously reported on Gigwise, the festival site at Worthy Farm in Somerset has been battered by heavy shower overnight.

Gigwise's Scott Colothan said the ground had already become a “semi-mud bath”.

Staty tuned to Gigwise for all the latest news, set reviews, interviews and photos from this year's Glastonbury festival over the course of the weekend.

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Glastonbury Festival 2009 - Day One In PHOTOS