All In My Head (Flex)

Fifth Harmony was an American girl group formed on the second season of the reality TV show "The X Factor" in 2012. The group originally consisted of Ally Brooke, Normani Kordei, Dinah Jane, Camila Cabello, and Lauren Jauregui. Known for their harmony-driven pop sound, Fifth Harmony gained popularity with hits like "Worth It" and "Work from Home."

Fetty Wap, born Willie Junior Maxwell II, is an American rapper and singer known for his blend of hip hop and R&B. He gained mainstream success with his hit single "Trap Queen" in 2014. The collaboration between Fifth Harmony and Fetty Wap on "All In My Head (Flex)" showcased their combined talents and reached a peak position of #24 on the Billboard Hot 100 chart in 2016.