Watch performance Fifth Harmony All in My Head (Flex)' on 'Dancing With the All Stars

Fifth Harmony Performance

Fifth Harmony took over Dancing With the Stars during Tuesday night's finale, with a tropical-tinged extravaganza performing "All In My Head (Flex)."

Fifth Harmony turned “Dancing with the Stars” into a flex zone. Fresh off their Billboard Music Awards performance with Ty Dolla $ign, the girl group hit the ballroom floor on Tuesday’s finale for a dazzling performance of their new single “All In My Head (Flex).”

Donning matching glittery outfits, Ally, Normani, Dinah, Camila, and Lauren strut their stuff while dancing to the reggae-infused track, which samples Mad Cobra’s “Flex.”

The album version, featuring Fetty Wap, can be found on their new album 7/27. Due Friday, the project also features Missy Elliott and the Ty Dolla $ign-assisted smash “Work from Home.”

“This is just one of those feel-good songs that you can’t help but jam to, no matter where you’re at or who you’re with!” said Dinah of “Flex.” “The overall melody is so memorable you’ll find yourself singing it everywhere you go, ESPECIALLY with Fetty Wap’s ridiculously, amazing catchy tunes!”

Watch their Dancing With the Stars performance (via Rolling Stone) here: