After Sarah revealed her cancer diagnosis she wrote her autobiography naming it Hear Me Out - after a song she wrote for Girls Aloud's second album.
A fan-lead campaign in March got the 17-year-old song to number one in the iTunes charts.
"She just sang it as it came out on the record," Miranda remembers about the writing and recording process for it.
"It sounded brilliant and it's so amazing that it then had a second chance recently, obviously under very sad circumstances, but it was lovely to see it get the love it deserved."
"It was very like Sarah, all emotions there on display and when she needed to write something great she did," says Brian.
"That's the sort of person she was. She left a great mark."
Published/Updated on 06/09/[email protected]:49
Meyan Nanguy Lifestyle Editor