Perrie Edwards was helped through problems by her close friends.
Speaking to the Daily Mirror newspaper, the 19-year-old star revealed how grateful she is for the ''support'' she's been given.
She said: ''The best part about being in a group is having each other for support. The girls are like my sisters and always look out for me. They have helped me through what has happened.
''My Nan has bone cancer and it's been recurring over the past few years.She was unwell before 'The X Factor' but she was always rooting for me throughout the show.
''She got a bit better but has been unwell again recently. It has been really hard but she is a little fighter.''
The 'Wings' hitmaker also admitted being in a relationship with someone in the music industry is tough, but her romance with Zayn is still going strong.
She added: ''Things are all good. We've all had to manage relationships in the band ... dealing with it and making time for our boyfriends.
''Zayn is my best friend and I've seen more of him since we finished our tour and but it's hard as One Direction have been on tour as well.''