6.6 million viewers watched the first show, 1.7 million more than the first show in 2004.
The band Avenue originally made it into Louis' final four choice, but they were later disqualified, after it was revealed they had already got a management deal, and that breeched X Factor rules.
The band Eton Road replaced them, a week before the beginning of the live shows.
The theme for the show was motown.
Robert sang Always and Forever which he also sang at his sisters funeral.
Leona changed the words to Lady Marmalade and sang " Volous le vous chante avec moi" which is translated to "Will you sing with me tonight"
Myleene Klass linked to the theatre in London with Leona's friends and family. Myleene was on the first of the recent wave of talent contests, appearing in Pop Stars and eventually winning a place in the final band Hear'Say
The bottom 2 were Kimberley and Alisha. Simon voted to send Kimberley home, Dannii voted to send Alisha home, leaving the casting vote to Louis after Sharon refused to vote and announced that she was leaving the show. Louis voted for Kimberley, meaning that she was the first act to leave the show.
The theme for this week's show was UK number 1's and the songs the contestants sung were:
Kimberley: It's raining men
Andy: I don't want to talk about it
Futureproof: She's the one
Beverley: I will survive
Emily: I knew you were waiting for me
Leon: Can't buy me love
Same Difference: Tragedy
Niki: Nothing compares to you
Rhydian: I'd do anything for love
The bottom 2 who had to face the judges vote were Daniel and Alisha. Louis voted to send Alisha home, while Sharon, Dannii and Simon voted to send Daniel home, meaning he was the second act to leave the competition.
The theme for this show was songs from the movies, and the song choices were:
Hope: Lady Marmalade
Beverley: I have nothing
Alisha: I say a little prayer
Same Difference: Breaking free
Daniel: Build me up buttercup
Rhydian Phantom of the opera
Emily: I'm not a girl, not yet a woman
Futureproof: If you don't know me by now
Andy: Staying alive
Niki: My heart will go on