On September 17, the group revealed their new cover performance - Janet Jackson's 1989 hit "Rhythm Nation" - through their official YouTube channel. In the video, the girls wear matching sexy black military-inspired outfits as they dance sharp and synced choreography together.

The song is the fourth cover the group has performed since they began the series at the end of August. Previous covers include the Bangles' "Walk Like An Egyptian," the Ting Tings' "Shut Up And Let Me Go," and the Knack's "My Sharona."

Check out their full Janet Jackson cover above!