Three into two would not go for X Factor judge Gary Barlow after he put through duo Rough Copy and then reunited them with former bandmate Kazeem to make them back into a trio for the live finals.
Two of the Croydon group, Joey and Sterling, were left a duo after visa issues stopped founder member Kazeem travelling to New York for the Judges' Houses stage.
Joey said performing without Kazeem was "crazy weird", adding: "We'll always be a three. It's just that there's two left here to carry the weight. He's relying on us to bring back the good news."
They impressed Barlow, who put them through, but said that without their friend it was like " a body with a piece missing" and got him back involved.
They were joined in the final by Miss Dynamix and Kingsland Road, while Hannah Barrett, Tamera Foster and Abi Alton went through from the girls.