A number of Taylor Swift fans are reportedly getting amnesia after attending her concerts.
The 33 year old singer is in the middle of a 52 show US tour.
But some fans who've said they dreamt of seeing Taylor Swift for a long time can't recall attending the concert.
US correspondent Dan Mitchinson says psychologists confirm it's a real phenomenon.
"Our brains react to extreme positive emotions, just like we do to negative stress. And what that does is overload our brains and make it harder to form memories."
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