The singer confessed that she doesn't "get" the boyband, despite being a "huge pop fan".
Asked if she liked the group, she told Digital Spy: "I'm afraid not! I live in a weird bubble where some stuff just doesn't touch me at all, even though they're massive.
"Maybe I have a cold, black heart or something. It might be that I don't like major chords in songs - I like menacing minor chords. I love Selena Gomez - she's got loads of them."
The star - real name Marina Diamandis - also admitted that she finds Carly Rae Jepsen's song 'Call Me Maybe' "too happy", adding: "For once, I don't get why something is so huge. I love the video, though."
Diamandis's new album Electra Heart is heading for number one on Sunday's Official Chart.
Watch the music video for her latest single 'Primadonna' below: