Class Dynamix are a contemporary choir who made the Semi-Finals during Series 14 of Britain's Got Talent. The members of the choir are all students attending Windmill Primary School in Leeds.
The choir did not know they were due to audition until the morning of the audition, when Judge Simon Cowell travelled to the school to tell them that Danny, their singing coach, had secretly filled in an application form.
In their audition, they performed an anti-bullying song with the refrain 'B-U-L-L-Y-I-N-G stop bullying!'. David praised the group for 'Putting such a positive message out there', with Alesha adding 'Every child in the world should be singing that song'.
Due to COVID-19 restrictions, the group pre-recorded their Semi-Final performance. Their performance took place in a school playground, and once again they performed an original song with the refrain 'I am all the things that I believe I am'. Ashley described the group as 'A complete vibe', with Alesha adding ‘Keep showing other kids how it's done'.