5ive - minus J Brown - Liberty X, Atomic Kitten, Honeyz, B*Witched and 911 all got back together for a TV show and a one-off concert.
There was drama when Blue joined the mix late in the series, but the bands came together and put on an amazing show at the Hammersmith Apollo in London.
In fact, their reunions were such a success that the groups then toured the UK, making another one-off programme along the way!
Sadly for us, The Big Reunion series one has now ended on a high with the bands releasing their charity Christmas single 'Wish It Could Be Christmas Everyday'.
The also took to the stage one last time for 'The Big Reunion Christmas Party Tour' and filmed another special. Bring on the next series and the new lineup!
Watch the video for 'Wish Is Could Be Christmas Everyday' here: