They're the pics of the actual girls...and not B&S.
Some are more photoshopped than others though - either for artistic impression like a softening of their skin, some to hide distinguishing tattoos or moles.
Some deception may be overly softening to hide cellulite and age. Some are old pics though..Mackenzie for example - She used to look like that, but I think they were taken when she was at Muse in her 20's.
Look for the blur or haziness.