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After a marvellous Musicals Week it is time for the Strictly semi-final! So, who is dancing to what and will there be any special guests?

Judges will be watching closely as each couple will perform two routines to try and impress them before the public gets the chance to vote.

Make sure you stick around for the results on Sunday night, 7.30pm, as special guests Little Mix will be performing their new single Break Up Song.

From Kylie Minogue to Will Smith, Christina Aguilera to Metallica, what will the couples be dancing to this week?

And who do you want to see in the final? Let us know in the comments!

Last week, Jamie and Karen found themselves in the bottom two. They managed to secure their spot for the semi-finals after being saved by Craig Revel Horwood and Head Judge, Shirley Ballas.

This week, Jamie and Karen will be dancing the quickstep to Thank God I'm A Country Boy by John Denver, as well as a smooth salsa to Last Dance by Donna Summer.

Will this be Jamie and Karen's last dance after last week's performance?

Maisie and her partner Gorka will be performing a Viennese waltz to A Thousand Years by Christina Perri.

A Viennese waltz is where both dancers turn their bodies clockwise and their partner anti-clockwise and includes non-rotating steps in between each change in direction.

They will also be performing Will Smith's Getin' Jiggy Wit It in a couple's choice.

Ranvir and Giovanni impressed the judges with their performance last week and scored 27 points.

Look out for their waltz to Un Giorno Per Noi, a slow piano and violin song by American singer Josh Groban.

To shake things up and keep things sweet, they will also be performing Candy Man by Christina Aguilera. Let's see what they come up with!

Next up on our list is HRVY and Janette, who will be performing a song from the La La Land soundtrack, as well as a rumba to Kylie Minogue and James Corden's only you.

HRVY and Janette recently made history by becoming the first couple to achieve a perfect score in week six of the competition.

Bill and Oti will perform a Charleston dance to Won't You Come ³ÉÈË¿ìÊÖ by Otti Patterson and Chris Barber.

They will also be performing a tango to Metallica's Enter Sandman.

We want to know who your favourite couple is and why? Who do you want to get through to the final and win the competition? What do you think of the series so far? Let us know in the comments below.