ASMR: The marketing dream

Singer-songwriter Billie Eilish has become the youngest person to reach number one in the UK album charts.

Her single Bad Guy has garnered attention because its video uses one of the fastest-growing trends online.

Known as ASMR, it involves certain sounds and whispers recorded into a microphone which stimulates tingling feelings in many - but not all - users.

Earlier this year an ASMR advertisement played during the US Super Bowl – further proof the trend has gone mainstream.