Singer could still be set for Glastonbury headline appearence
Lady Gaga, Elton John dazzle with duet
The pop star takes an early lead
Coldplay and Jay-Z also set to feature
Kings Of Leon, Yeah Yeah Yeahs, Phoenix also in the running
Drake also appears on forthcoming new effort
The Strokes, MGMT, MIA also make the run-down
Winners for Berlin event revealed
Malaysian party are concerned singer could promote 'Western sexy performances'
Jay-Z, Katy Perry, Madonna and Janet Jackson among the performers