UPDATE! Roisin never said this.
Róisín Murphy, to The Daily Mail:
Lady Gaga is just a poor imitation of me.Hilarious! For more on what Róisín thinks of That Woman, see the Róisín Murphy Blog or RTE.
Update: Watch the interview below and you'll see (at about 7:38) the light tone in which she speaks about Gaga. The thing about Róisín is that I don't imagine her easily open to be intimidation.