Duo contribute cover of 'Back To Black' to The Great Gatsby soundtrack
Superstar will appear alongside Florence + The Machine, Haim, Ellie Goulding and Rita Ora
The track has been produced by Hit-Boy
47-year-old is on receiving end of hefty lawsuit for leaking '4'
The new walkway was originally named after the singer as a joke by construction workers
Fans take to Twitter to vent their frustration as briefs appear on ebay
The Mrs Carter Show world tour starts in April and now includes six shows at London's O2 Arena
Ticketscript apologise for fake gig listing
'I control my own brand' singer says of her $300 million empire
Pair rumoured to be playing London's 500-capacity The Garage venue