November 04, 2013 at 02:00 PM EST

Seven Dancing With the Stars couples remain in season 17’s epic-as-always quest to win a hardened knob of glitter. On tonight’s Week 8 performance show, they’ll have to flaunt their amateur moves in front of perhaps the most sparkly non-ballroom dancer in history: Cher, who will be guest-judging, performing twice, and changing outfits three times.

During rehearsal Friday, three pairs offered EW a glimpse of tonight’s routines set to Cher’s music and discussed their biggest challenges throughout the week. Preview Brant Daugherty and Peta Murgatroyd’s foxtrot, Corbin Bleu and Karina Smirnoff’s Argentine tango, and Jack Osbourne and Cheryl Burke’s tango below!

You can find all of’s Dancing With the Stars episode recaps here.
Reporting by Michele Stueven.

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