I always saw The Fame and The Fame Monster as two separate eras but that may be because her image was quite different in the two eras (more light and fun in TF and more dark and edgy in TFM)

you could get TFM as a standalone or as a bundle I think, I've always seen them as seperate anyway

TFM is a separate album

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BTW is one of my favourite albums of all time and the best pop album of the decade

BTW out of the list, TFM overall, poor ARTPOP being snubbed by yall