Taylor's mom battles tumour

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Taylor Swift

Taylor Swift's mom is battling a brain tumour, the singer has confirmed.

The star's mom Andrea was first diagnosed with breast cancer in 2015, and last year it was revealed that the illness had returned, with Taylor penning the song Soon You'll Get Better, from her album Lover, about the battle.

In a new interview with Variety, the ME! hitmaker confirmed that, during Andrea's treatment, doctors discovered a tumour on her brain, presenting a whole new set of issues the family hadn't experienced before.

"The symptoms of what a person goes through when they have a brain tumour is nothing like what we've ever been through with her cancer before," she said. "So it's just been a really hard time for us as a family."

Taylor confirmed to the magazine that her mom's health issues are the reason she won't be going on a full tour in support of Lover this summer.

Instead, the star is performing four Lover Fest dates in Los Angeles and Foxborough, Massachusetts in July, after a 12-date festival run in Europe and South America, allowing Taylor to focus on family matters for the rest of the year.

"This is a year where I have to be there for my family - there's a lot of question marks throughout the next year, so I wanted to make sure that I could go home," she told Billboard last year.