Well that's one way to end your last competitive performance on the X Factor.
The band and X Factor finalists 5 after midnight gave it their all in their final performance, singing the hit 'Tears'. Trio were first joined by Clean Bandit as they walked through the audience at Wembley Arena.
Related:Which X Factor series has produced the most No1 hits?
However, not content with just one famous duet partner, the band pulled out all the stops and were joined by last year's winner Louisa Johnson to finish the song and they nailed it.
Plus seeing a former X Factor champion made us all feel a bit nostalgic.
Related: The X Factor's 16 best-ever singles, ranked: which is our No.1?
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And it wasn't just the audience at Wembley who were loving it, but the people at home also really seemed to liked the duet.
It was the bands second performance of the night, having already pulled out all the stops singing Beyonce's 'Crazy in Love'.
Matt Terry performed with none other than his mentor Nicole Scherzinger while Saara Aalto sang with the sensational Adam Lambert.
The X Factor airs on ITV.
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