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Fifth Harmony is a quintet no more.

Camila Cabello has exited the band, the group announced late Sunday night on Twitter.

“After four and a half years of being together, we have been informed via her representatives that Camila has decided to leave Fifth Harmony. We wish her well,” the statement reads.

“You Harmonizers have been there with us since the beginning, you’ve supported us, you’ve rejoiced and cried with us, you’ve grown with us, and with your love and support, we will continue on,” the group said.

Cabello performed with Fifth Harmony at the iHeartRadio Jingle Ball tour in Florida hours before the announcement.

The remaining members — Ally Brooke, Normani Kordei, Dinah Jane Hansen, and Lauren Jauregui — will continue the popular girl group as a foursome.

The band formed in 2012 after finishing third on Season 2 of the U.S. version of Simon Cowell’s “The X Factor.” Fifth Harmony has released two albums: “Reflection” in 2015, which featured the hit “Worth It,” and “7/27,” with “Work From Home” feat. Ty Dolla $ign.

Cabello has already found solo success, recently collaborating with Shawn Mendes on “I Know What You Did Last Summer,” and with Machine Gun Kelly and Cabello on “Bad Things.”

Breakup rumors intensified in September when Cabello left a St. Louis concert mid-show due to anxiety. Fifth Harmony later canceled half of their European tour.