Rapper took to Twitter to unveil two-minute preview to new material
Rapper's instrumental soundtrack featured on yesterday's show
Singer has provided music for 'The World Tomorrow'
Singer's self-titled tome will be an 'autobiographical monograph in collages'
Rapper hits out after Channel 4 documentary reveals atrocities in Sri Lanka
The 'Bad Girls' artist will apparently have to dip into her own pockets if halftime show broadcaster NBC is charged
US network issues the statement after singer's 'completely inappropriate gesture'
Track is first taster of singer's fourth studio album
MIA also says she wants to release the follow-up to 2010's 'Maya' this summer