Elton John is almost as well known for his legendary music as he is for his advocacy, having founded The Elton John AIDS Foundation in 1992.ALSO: HELLO! launches Jubilee T-shirt collection to celebrate Queen Elizabeth in styleDuring an event in New York City for yet another crucial cause, a breast cancer awareness charity gala hosted by the one and only Elizabeth Hurley, the musician combined his two passions, and made a surprise appearance that left the crowd at a loss for words.Both he and his husband, David Furnish, were honorary co-chairs of the night, and though they couldn't make it in person, Elton still took guests by complete surprise by making a virtual appearance, and performing live.WATCH: Elton's son skiis like a proMORE: Elton John shares rare photo of sons as he posts sweetest tributeAfter Elizabeth shocked the audience as she presented the singer, he first took a moment to give a heartfelt tribute to the woman that inspired the event, Evelyn Lauder, one of breast cancer awareness' leading activists, who passed away from ovarian cancer in 2011.The music icon said: "I'm sending my love to BCRF. I tried, but I'm sorry I can't be there."He continued to express that: "This one is for all of you and thank you for helping the BCRF make more money every year, it's an amazing charity, in memory of an amazing woman.