The Honeyz' ever-changing lineup is quite something (but pales in comparison to several other girl groups we've discussed already).
They started with a lineup of Celena Cherry, Heavenli Abdi and Naima Belkhiati and released their debut album. Then Heavenli left, Mariama replaced her and they re-released the debut album. Then Heavenli came back and they recorded their second album, which was cancelled after underrated bop Talk To The Hand tanked:
They've then been through various lineups since then, all of which have consisted of Celena Cherry and some combination of Heavenli, Naima, Mariama and Celena's sister Candace. Since Celena did all the lead vocals anyway I don't think it's ever really mattered, but Heavenli in particular has left the group three times, rejoined twice, and changed surname twice (she went from Abdi to Roberts at one point - I'm not sure why - and then went from Roberts to Denton when she married James Denton in 2009).
Fans of dance bops may prefer their 2015 single Definitely Something to Finally Found: