Saturday's show features a gaggle of brilliant acts, but Halliwell and Gary Barlow's bickering dominated proceedings early on. Louis Walsh is forced to defend the Take That star when Halliwell has a pop at his bandmates.
The X Factor show four- in pictures:
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Male trio Times Red provide some entertainment for the girls as the Abercrombie & Fitch workers flash their abs and impress with a Amy Winehouse mash-up.
Melanie McCabe, who just missed out in 2011, is back for a second crack, while Tulisa Contostavlos comes face-to-face with a passionate admirer called Jason.
However, it is customer services advisor Chris who is the surprise package of the show. The 34-year-old stuns the judges and prompts Gary Barlow to ask: "How the hell have you kept that voice hidden till now?"
The X Factor airs tonight at 8.10pm on ITV1.