[kylec]

The Wikipedia article mentions a band, the Sugababes, that started with three founding members, but one by one all of them ended up leaving the band and being replaced. Is it still the same band?

An interesting twist is that the three founding members regrouped and formed a new band, with the Sugababes still in existence. Which is the real Sugababes?

[Zikes]

A band isn't only defined by its members, though. They can have a distinct sound, a preferred genre, even various brandings and styles that make for a markedly different performance.

[kazinator]

But those attributes are defined by the members. :)

[coldtea]

Not really. For bands like the Sugarbabes they are defined by the producers, session musicians, composers and lyricists.

[Zikes]

But those members may choose a different set of attributes to build a different band brand.