Olly Murs has gone straight to the top of the UK charts with his debut single, ‘Please Don’t Let Me Go‘.

He did this despite the tough competition from Katy Perry and Taio Cruz. X Factor 2009 winner Joe McElderry famously failed to reach number one when his single was first released – although captured the top spot after Xmas.

This weekends X Factor is to be split over two days, with all three acts singing on Saturday, and the final two in a sing-off on Sunday.

On Saturday, the acts will be joined by the now traditional celebrity pairings, and here’s who you can expect to see:

Stacey Solomon + Michael Bublé
Oly Murs + Robbie Williams
Joe McElderry + George Michael

This week saw the semi-final of X Factor 2009, and the exit of Danyl Johnson after he polled the lowest number of votes from the public

“I may have gone out in the semi-final, but I’ve gone out to some of the best people I’ve ever met” was Danyl’s gracious response when told of the result. Simon Cowell was impressed with Danyl, saying he had “gone out on a high”.

Danyl’s exit means that Olly Murs, Stacey Solomon and Joe McElderry are in next week’s final.

This week everyone is singing two songs – one by Elton John, the other by Take That. With John and Edward’s departure leaving Louis out of the running, will Dannii be eliminated with the exit of Stacey Solomon? Or will Simon or Cheryl lose another act?

Here’s what they will be performing:

Stacey Solomon
Something About The Way You Look Tonight
Rule The World

Joe McElderry
Sorry Seems To Be The Hardest Word
Could It Be Magic

Lloyd Daniels
I’m Still Standing
A Million Love Songs

Danyl Johnson
Your Song
Relight My Fire

Olly Murs
Saturday Night’s Alright (For Fighting)
Love Ain’t Here Anymore