Pop star Taylor Swift has nightmares about ending up alone because she fears fame will turn her into an "awful and intolerable" woman.

The singer, who is currently single after reportedly splitting from One Direction star Harry Styles in January (13), admits her number one worry is her success will change her for the worse and lead to a "lonely" life.

She tells Britain's InStyle magazine, "I never want to end up kind of a self-centred, vain human being... I don't wanna end up being awful and intolerable. Alone. Laying in a marble bathtub by myself... sad, with a glass of wine just complaining that (I) ended up alone because I pushed everyone away because I thought I was too good to hang out with anybody.

"The typical Hollywood sad cliche of the poor lonely starlet with no one because she put up all these walls and didn't trust anyone. That's my fear."