The singer, who has covered The Smiths' 'Please, Please, Please Let Me Get What I Want' for this year's John Lewis Christmas advert, insisted that she "loves" their version of Damien Rice's song.
She told Digital Spy: "I actually quite like their version of 'Cannonball' - I almost wanted it to kick off more and become a full-on dance track!
"Maybe I only loved it because I was caught up in the moment - it's obviously not the ideal song for them, but who cares?"
Speaking of the group's recent X Factor win, she admitted: "I was really pleased for Little Mix, although I loved Marcus too because he's a fellow scouser. The girls just managed to out-do him on the night, whereas Marcus seemed to choke on the final.
"I don't think I could do [The X Factor]. I love the show and I'm full of admiration of the people who go through it, but I don't know how I could audition in front of all those people. I haven't got the backbone for it. I'd fall to pieces! There's just no way."
Slow Moving Millie's new album Renditions is out now.
> Read Digital Spy's interview with Slow Moving Millie
> Slow Moving Millie: 'The Smiths like my cover of Please'
Watch the 'Please' music video below: