Lauren Platt wowed the both the X Factor's judges and viewers with her unusual take on Pharrell Williams' Happy at the weekend.

But one famous fan of the show was slightly less impressed with the cover version - because it sounded a bit too familiar.

Foxes took to Twitter to point out that the cover was remarkably similar to her version of the song - recorded for the Radio 1 Live Lounge earlier in the year - which placed the lyrics over the music from Massive Attack's Teardrop.

And she used a healthy dose of sarcasm to point it out, tweeting: "Smart choice @cherylOfficial @TheXfactor @simoncowell to mash up Happy and Teardrop wish I'd thought of that..."

Following it up with: "Oh wait, i did...In March (@BBCR1 #LiveLounge)"

Smart choice @cherylOfficial @TheXfactor @simoncowell to mash up Happy and Teardrop wish I'd thought of that...

— Foxes (@iamfoxes) October 12, 2014

Oh wait, i did...In March (@BBCR1 #LiveLounge) https://t.co/wmHwbWABZ8

— Foxes (@iamfoxes) October 12, 2014

Have a listen to the two tracks and see what you reckon.

Blonde Electra and Overload Generation have become the first two acts to depart this year's contest.