'Environment-friendly' Olivia Newton-John planted 10M trees in Australia

Singer Olivia Newton-John revealed that she has planted around 10 million trees in Australia.

The 'Summer Nights' Aussie hit-maker, who is from a family of academics, shared that her grandfather Max Born was a Nobel Prize winner, although her career was launched when she won a talent competition at the age of 15, E! Online reported.

The 66-year-old singer also shared that she once owned nine dogs, six horses, and cats and always try to protect animals.