Claire Arnold channels the spirit of great '60s singers for new British R&B artist Olivia Dean.

Recreating the style of a mid-century monochrome TV performance, Dean performs Hardest Part as the lead singer in a classic Motown-style girl group. But then, in a Wizard of Oz moment, the style changes to a disco-era TV show aesthetic - in colour, prism lenses - with Olivia now the Diana Ross-like solo star. And we get to see that shimmering gown she's wearing in all its glory.