Taylor Swift opens up about heartbreaking news of mother's brain tumor

The singer reveals her mother was undergoing treatment for cancer when the tumor was discovered.
2:48 | 01/22/20

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Transcript for Taylor Swift opens up about heartbreaking news of mother's brain tumor
We turn to our "Gma" cover some difficult news from Taylor Swift about her mother. Andrea swift is undergoing treatment for best cancer when a brain tumor was discovered and swift is now sharing how she and her family are dealing with the diagnosis. Will reeve here with the story. Good morning, George. Yeah, sad news, Taylor Swift has a song called "Soon you'll get better" and as with most of her songs it's personal. In this case it's about her mom and her mom's health which swift now tells "Variety" magazine has taken a turn for the worse. This morning, Taylor Swift revealing devastating news about her mother's years' long battle with cancer. While she was going through treatment they found a brain tumor and the symptoms of what a person goes through when they have a brain tumor is nothing like what we've ever been through with her cancer before. So it's just been a really hard time for us as a family. The artist dedicating a song from her latest album to her mother's fight against the illness. What am I posed to do if there's no you Reporter: Swift first disclosed her mother's health battle in a tumblr toast writing I'm saddened to tell you my mom has been diagnosed with cancer. She's got an important battle to fight. Just weeks after that revelation Andrea received a standing ovation as she presented Taylor with the acm milestone award. I know you love her as I love her. And for that I thank you Reporter: There had been no public updates on her health until last March when the singer wrote in an "Elle" essay I've had to learn how to handle serious illness in my family. Both of my parents have had cancer and my mom is now fighting her battle with it My parents are here tonight. Reporter: Amid her struggles a heartwarming moment as swift's mother was in the crowd wiping away tears when they are daughter took home artist of the decade at November's American music awards. The best day with you Reporter: The ten-time grammy winner appearing to slow down following the news taking on a noticeably lighter summer touring schedule for her latest album "Lover" playing just four stadium dates in the U.S. Citing her mother's health as the reason. We don't know what's going to happen. We don't know what treatment we'll choose. It was just the decision to make at the time for right now for what's going on. Swift goes on to tell "Variety" that in her life her mom is, quote, really the guiding force, almost every decision I make, I talk to her about it first. So obviously it was a really big deal to ever speak about her illness. Michael, brave stuff and we're thinking about the swift family. Yes, we are.

This transcript has been automatically generated and may not be 100% accurate.

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