Rumoured new single emerges online for the first time in full
Fans post video pictures and information online
'I Am... Sasha Fierce' follow-up set for summer release
Singer will no longer be managed by her dad
Frank Ocean posts new studio photo online - then takes it down
Singer's publicist says she gave her fee $2 million (£1.3 million) fee away
Organiser also says she is 'lucky' to get Coldplay
Singer 'cannot wait' to head to Worthy Farm
Gossip website reports that both acts will join Coldplay at festival
Raunchy promo clip deemed 'unsuitable' for children