The Girls Aloud singer, who is currently wowing on the dancefloor on Strictly Come Dancing, spoke about her weight loss from training on the show.
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She said of her derriere disappearing: "No, it hasn't! You can feel it if you want. It's still there, believe me!"
Having injured herself this week, she said: "I've pulled my knee which has been a little bit tricky but I'm hoping I can turn it back around."
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Although she's consistently high up on the scoreboard, Walsh still thinks she has stiff competition.
She said: "Denise is amazing, Louis is brilliant too. Dani's really good, so is Lisa. Actually everyone is. I'm going to have to up my game!"
Watch Digital Spy chat to the X Factor and Strictly stars below:
