Robbie Williams joined Gary Barlow, Mark Owen and Howard Donald on the BBC One show last night,
And in a VERY special performance, the band took to the stage together to sing one of their biggest hits: The flood.
Whilst Robbie was part of Take That the band had six No. 1 singles, and three No. 1 albums.
Robbie is also a hugely successful solo artist with over 70 million records sold worldwide making him the best-selling British solo artist in the UK. Robbie recently scored his twelfth No. 1 solo album with ‘The Heavy Entertainment Show’ which has been certified as Platinum in the UK.
Ahead of the show, Robbie said: “I’m looking forward to being back with Gary, Mark and Howard on Let It Shine."
The final which aired on Saturday 25th February was also meant to see Robbie take the role of guest judge alongside Gary, Dannii Minogue and Martin Kemp as the public decided which band would be crowned the winners of Let It Shine.
However he had to pull out due to an illness to his back and was replaced by Peter Kay.
After seven weeks of singing, it was Five To Five who won Let It Shine in Saturday's show.
The group - made up of Curtis T Johns, AJ Bentley, Yazdan Qafouri, Sario Solomon and Nick Carsberg - topped the public vote in the live final.
They will go forward to star in a new stage school musical called The Band based on the songs of Take That.
The show will begin a 12 month tour of the country from September 2017.