She is a four-time Grammy award winner who has amassed five number-one and ten other top ten Billboard Hot singles,  and two number-one Billboard solo albums. Eleven of her singles including two platinum and 14 of her albums including two platinum and four double platinum have been certified gold by the RIAA. She has sold an estimated million records worldwide, making her one of the world's best-selling artists of all time. Newton-John has been a long-time activist for environmental and animal rights issues. She has been an advocate for health awareness, becoming involved with various charities, health products, and fundraising is olivia newton a lesbian.