[Fom]

It is still the Sugababes, as someone said members were replaced and picked by the current sugababes at that time. They agreed to let them in and let them be a full sugababe. Just because they have left doesn't mean they can take back their word, they have just as much rights to be in the sugababes as any of the others, they were accepted in.

As soon as they got accepted in the group, they had a right to be in that group and carry the name.