Pop sensation's new single was produced by Calvin Harris
He's also set to open on the pop singer's 'Loud Tour'
Singer tweets that her sixth record is just months away
Animal rights group has a big problem with singer's ostrich feather top
Singer sues former owner for allegedly failing to point out structural defects in her home
Pair will debut their video collaboration during awards pre-show
Star's Weston Park headline performance draws muted response
Spice Girl says singer's image is too provocative
Plans for a documentary also revealed