From the mud of Glastonbury to the blockbusting headliners of Coachella,

music festivals have become big business.

Annually, there are around 800 festivals in the US alone.

It's an industry worth nearly $10 billion,

attracting 32 million revellers annually,

half of whom are millennials.

Tickets average 200 pounds per head in the UK, but over the past 10 years,

ticket prices have risen way above the rate of inflation.

More than $1.5 billion was spent by companies sponsoring events in 2014.

The live music industry is booming as traditional record sales flounder.

Artists can command up to 90% of gross ticket receipts,

but bag only 10% of the net profit from recorded music.

Musicians can charge big bucks.

Acts such as The Flaming Lips and Damian Marley

can earn up to a reported 90,000 pounds for a performance.

Whereas bigger names such as Justin Bieber or Madonna

can charge up to a cool million.