Six-time Grammy Award winning singer Dionne Warwick joins "CBS This Morning Saturday" co-host Michelle Miller to discuss her sixty year career, her love for Christmas and using Twitter to connect to a younger generation of fans and artists. Warwick tells Miller what prompted her to tweet Chance the Rapper, The Weeknd and Taylor Swift. Plus, what she and Chance the Rapper spoke about when they finally connected on the phone. Warwick, who is celebrating her 80th birthday on Saturday, is hosting a Holiday/Birthday celebration on December 12th at 7pm ET to raise money for "Hunger Not Impossible."