Fronted by Mel Giedroyc and Sue Perkins, the showdown returns this evening on BBC One with the last of three star-studded Saturday night heats culminating in a grand final next weekend the 25 March.
Once again celebrities will don more fantastic outfits and learn more iconic dance routines for Comic Relief, but this time the brave celebrities will be facing double the challenge – dancing and singing!
Tonight is the grand final with the winners from the past three weeks of heats battling it out for the title.
Among those competing will be a spectacular supergroup performance from The One Show reporters featuring Angellica Bell, Iwan Thomas, Alex Riley, Michelle Ackerley and Dominic Littlewood.
They'll be singing Born This Way by Lady Gaga after making it through to the final last weekend.
Competing against them this evening will be TV presenter Alison Hammond, comic Sara Pascoe and radio hosts Rickie Haywood Williams and Melvin Odoom.
Also fighting for the title will be the Stars of Casualty and Holby City - made up of Chizzy Akudolu, Tony Marshall and Amanda Henderson - and The Chasers - made up of Anne Hegerty, Jenny Ryan, Mark Labbett and Shaun Wallace.
This weekend it's down to the public to decide the winner.
After all six performances, the viewer vote will open and the one with the most votes will be crowned the first ever Let's Sing and Dance WINNER!
Let's Sing and Dance final airs tonight at 6:55PM on BBC One.