Pop star's fashion line for River Island will hit shops on March 5
Meanwhile, the singer donated $1.75 million to a local hospital
Simon Cowell wants 'Diamonds' singer for reality show role
Star speaks out after being accused of ignoring journalists on board flight
'Diamonds' singer's seventh album tops the Official UK Album Chart
Singer pulled out of scheduled appearance at last minute this week
Following ups and downs (and take-offs and landings), tour is now complete
The rockers are lagging behind Rihanna's 'Unapologetic' in the midweek charts
Singer blames a cold for her lack of socialising