Meanwhile, Perry's new single 'Roar' has leaked ahead of its planned premiere later today (August 12)
Track is the first to be taken from her forthcoming new album 'Prism'
US pop singer reveals album title and release date on giant gold truck
Keith Hudson has also asked people to 'pray' for his daughter
Jahmene Douglas rules out performing 'Last Friday Night'
'Teenage Dream' singer will play at the Nokia Theater in Los Angeles on October 7
'Firework' singer and Australian cricketer Doug Bollinger distracted exam students with saucy dance moves, claims lawyer
The singer's spinning peppermint bra is declared a safety hazard by tour insurers
Singer's new film is trounced by 'The Amazing Spider-Man' according to box office figures