Camila Cabello

Camila Cabello made up her mind a long time ago that she was done with Fifth Harmony -- but only officially gave notice a month ago ... so say sources close to the band. Unlike Camila's account, sources with Fifth Harmony tell TMZ she just dropped the bomb on them mid-November ... with no prior…

Camila Cabello is calling BS on Fifth Harmony claiming to be blindsided by her leaving the group ... and insists everyone's known she'd be hittin' the road for a while now. Camila posted a lengthy response to Fifth Harmony's own brief statement earlier Monday morning, saying the claim of her reps…