X Factor's Rak-Su are dominating the charts with their original songs.
Studio versions of all the tracks from the X Factor 2017 live shows have been released for download via iTunes.
And it's fair to say that some are doing a lot better than others...
Last Saturday night the Groups and Boys perform before Sunday the Girls and Overs took to the stage. All of the performances have been released onto iTunes to download, as well as Apple Music to stream.
Rak-Su, who topped the vote on Saturday, went straight to Number 1 with their song Mona Lisa.
It's the group's second time on top, having also previously peaked at Number 1 with another original song, Dimelo, which remains in the chart.
Also still in the charts is another of Rak-Su's original tracks, Mamacita. Even the group's cover of George Michael's Faith is still in the iTunes download chart, at the time of writing.
The only other act to join the group in the charts right now is Grace Davies, who has also been singing original songs. Her latest track Hesitate is currently in the Top 40.
It's therefore no surprise that bookies consider Rak-Su 'unstoppable' in the race for victory.
"Now 8/13 from Even money, Rak-Su are undoubtedly the dominant force in the competition and the ones to take down.”
The X Factor 2017 continues next Saturday and Sunday night with the Semi Finals.
The next theme is 'Cool Britannia' and it's expected another two contestants will be heading home.
Plus, there will be performances from Ed Sheeran and former X Factor winner James Arthur.