During her time in the group, Brooke and her bandmates released the albums Reflection (2015), 7/27 (2016), and Fifth Harmony (2017).

In June 2017, Brooke was featured on DJ-duo Lost Kings' song "Look at Us Now" with American rapper ASAP Ferg.

[2] She released the song "Vámonos" in November 2018, a collaboration with Kris Kross Amsterdam and rapper Messiah.

[3] In December 2018, she released the song "The Truth Is in There", written by Diane Warren, as part of Weight Watchers International's Wellness That Works campaign.

with Afrojack, "Gatekeeper" with Fedde Le Grand, and "Feeling Dynamite" with Joe Stone.