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Ava had been 'hanging out' with a group of girls on Merseyside when they encountered another group of children, one of whom began filming the schoolgirl dancing.
Ava, 12, was knifed in Liverpool city centre on November 25 last year with the boy, 14, now on trial for her murder.
CCTV of "altercations" which led up to the stabbing of Ava White is also played to the jury.
The 12-year-old was stabbed in the neck after 'hanging out' with a group of girls hours after the event in Liverpool city centre on November 25 last year.