Abba say their ‘hearts ache’ following Olivia Newton-John’s death aged 73

Dame Olivia Newton-John (Stefan Rousseau/PA)

Abba have paid tribute to Dame Olivia Newton-John as the “nicest, kindest and most loving woman” and hailed her “brave fight” against an “invincible enemy” following her death from cancer.

The British-born singer and actress died “peacefully” at her ranch in Southern California on Monday morning at the age of 73, with her husband John Easterling confirming the news on social media.