Breaking News: EDM Superstar Avicii Dead at 28

Watch Fifth Harmony 'Flex' on 'Dancing With the Stars'

Girl group brought steamy choreography and Island vibes to television show

Fifth Harmony performed their reggae-styled single "Flex" on 'Dancing With the Stars.'

Fifth Harmony transformed the Dancing With the Stars ballroom into a reggae club during Tuesday's finale episode with new single "All In My Head (Flex)." The all-female group had the stage crammed with backing dancers doing tight choreography. 

The album version of "All In My Head" features rapper-singer Fetty Wap and is on the group's upcoming second LP, 7/27. On Sunday, the group performed the album's steamy first single, the Ty Dolla $ign-featured "Work From Home," at the 2016 Billboard Music Awards. 

7/27, which follows 2015's Reflection, is named after the day the quintet were united on reality singing competition The X Factor. (Member Lauren Jauregui also told Rolling Stone that the titular reference to a 727 jet indicates their desire to "take off" with the LP's release.)