Showbiz
Rex Features
The Jonas Brothers singer is said to have told the 18-year-old that their relationship was over during a telephone call.
A source said Swift had been left heartbroken.
Earlier this summer, the 19-year-old boyband member admitted he had the hots for Girls Aloud star Cheryl Cole.
He had previously spoken of his crushes on Natalie Portman and Harry Potter actress Emma Watson.
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