Earlier this month saw the opening show of the new series, back on TV for the first time since 2013.
This time the celebs aren't just dancing but also singing as they re-create famous pop music videos on the stage.
In three live heats, five celebs performed for both viewers and a guest panel of fellow celebrity judges.
The public will vote for their favourite celebrity performers with the most popular heading straight into the final while the judges will picked between the two runners up.
The celebrities in the final this weekend include comedian Sara Pascoe, Radio and TV presenters Rickie Haywood Williams and Melvin Odoom, The Chasers - Made up of Anne Hegerty, Jenny Ryan, Mark Labbett and Shaun Wallace - and the Stars of Casualty and Holby City - Made up of Chizzy Akudolu, Tony Marshall and Amanda Henderson.
They're joined by The One Show reporters - Made up of Angellica Bell, Iwan Thomas, Alex Riley, Michelle Ackerley and Dominic Littlewood - and TV host Alison Hammond.
Let's Sing and Dance is in aid of Comic Relief.
Red Nose Day is back on Friday 24 March 2017, and it’s all about your power to make the world a better place, simply by having a great time. All the money raised through Red Nose Day will help to change countless lives, both here in the UK and across Africa.
To get involved and make your laugh matter, go to rednoseday.com
Let's Sing And Dance final this Saturday 25 March 6:55PM on BBC One.