The rapper's latest LP 'Recovery' is set to end Oasis' brief reign at the top of the album countdown.

Meanwhile, British rapper Example's new album 'Won't Go Quietly' is on course to debut inside the top-5, according to the Official Charts Company.

On the singles chart, Perry's 'California Gurls' has sold twice as many copies as its nearest rivals.

As it stands, the top-3 on Sunday will be completed by K'Naan's 'Wavin' Flag' and 'Shout' by Dizzee Rascal and James Corden.

(by Jason Gregory)