Despite a legendary career spanning six-plus decades, O.G. diva Dionne ... s What Friends Are For” in 1985. The chart-topping AIDS charity single also featured Gladys Knight, Elton John and ...

Related: Gladys Knight and Dionne Warwick Laugh Off Identification Mix ... Your soul is unlike any other and I am honored to call you a friend and sister," she wrote. "I love you!

Dionne Warwick and Gladys Knight react after being mistaken for each other! Plus, ET speaks with the commentator who confused them. Zendaya, Tiger Woods and more celebs cheer on Serena Williams ...