The X Factor bosses have denied that this year's contestants have been miming on the live shows.
This time the denials relate to that group song from Sunday night's results show, where the final five performed Saturday Night's Alright for Fighting.
Some viewers accused the contestants of miming to the song, with one fan of the show quipping: "Is this Xfactor or Lip-sync battle ?"
However a spokesperson for the show insisted: "The contestants did not mime in the group ensemble performance on Sunday night."
It's not the first time this year that the show has had to deny claims of miming.
Only earlier this month there were accusations that Ryan Lawrie was "blatantly miming" his main performance.
The singer belted out Twist and Shout by The Beatles for the week's Girl Band v Boy Band theme.
“Thought Ryan was pretty good until he slipped up and showed us he was blatantly miming," one viewer on Twitter wrote.
However a source on the show denied the claims.
They told The Sun newspaper: “No contestant has ever mimed on the X Factor during the live shows. It is a singing competition after all.”
And back during the auditions, a spokesperson rubbished reports suggesting that 5 After Midnight were lip syncing during their audition.
But even that's not the first time that the show has come under attack for tweaking the sound of performances.
During Series 5 in 2010 The X Factor was rocked by an AutoTune scandal that prompted hundreds of complaints to TV Watchdog Ofcom.
The X Factor 2016 is back next Saturday and Sunday night on ITV at 8PM with the live semi-finals.