During the 24-year-old's mash-up of 'Hung Up' and 'Gimme Gimme Gimme' by Madonna and ABBA, Clark said that he was singing for Spraggan, who today confirmed that she had pulled out of the competition after suffering ill health.
Clark declared: "This one's for you Spraggan, I love you!" while singing on tonight's episode (November 3).
A pre-recorded segment for the show also showed Clark taking his mentor Nicole Scherzinger back to his home county of Essex, and spending time in a beauty parlour with former The Only Way is Essex star Amy Childs.
The footage showed Clark and Childs 'teaching' Scherzinger how to say phrases such as 'well jel' and 'reem', before she asked Childs to give her a vajazzle of Clark's face.
Following his performance, Louis Walsh said that Clark was "camp" but that he "put a smile on everyone's face", and Tulisa said: "I think everyone is starting to see what we see behind the scenes - you're a genuinely entertaining person and performer."
Gary Barlow critiqued Clark's performance, saying: "The vocals at the top, they weren't too bad this week. After then it was just all chaos.
"I really enjoyed your shout-out to Lucy, but I get the feeling that might be your last performance on The X Factor."
Watch Rylan Clark perform 'Hung Up'/'Gimme Gimme Gimme' on The X Factor below:
Photo gallery - The X Factor number ones week:
Copyright: Ken McKay/Thames/Rex Features