Visible differences: 'It's nice to see artwork that celebrates us'

Artist Kelvin Okafor is celebrating people with visible differences, including scars, a skin condition called vitiligo and hair loss in an art exhibition.

His models include some famous faces like presenter Nikki Lilly, singer Seal and presenter and activist Katie Piper.

14-year-old artist Andoni has a visible difference called alopecia, meaning he has lost most of his hair.

He went to visit Kelvin's exhibition in London to find out more about his work.