The two teams will trawl through other people's antiques to then auction them off. The team with the most profit wins.
Bargain Hunt's special episode is to coincide with their fourth annual celebration of BBC's Music Day.
The BBC reports that Kylie will be voicing over train announcements in some of the UK's biggest stations to urge commuters to do The Locomotion with her.
Kylie Minogue is one of the 2018 ambassadors, following on from 2017's Will Young, Ozzy Osbourne, Miles Kane, and Shaun Ryder.
As the BBC Music Day ambassador, Minogue explains, "I truly believe in the power of music to bring joy and lift the soul. Hopefully my little messages for train passengers will be a nice surprise and a reminder of the power of music."
Furthermore, Lianne La Havas, Amy Macdonald, Leslie Garrett and Ella Eyre will go head to head with BBC Radio presenters in a music special episode of Pointless.