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Rachel Hylton clashes with mentor Dannii Minogue over her choice of song on this week's X Factor

With a theme of US and UK number one singles, Minogue insists that Hylton perform Robyn's dance hit 'With Every Heartbeat'.

Hylton objects to the choice, saying: "I'm worried about the song because it's not in my comfort zone."

However, Minogue sticks to her decision. "[I] chose the song because I know she can do the job, I won last year and I know what I am doing," she insists.

Hylton eventually relents, saying: "I am going to have to trust Dannii. She's my mentor, she chose me for the final 12 and I am just going to fight for my place on Saturday night."

The X Factor airs tomorrow at 7.15pm on ITV1, with the results show following at 10pm.