CBS This Morning

Dionne Warwick on going viral on Twitter, celebrating her 80th birthday and her love for Christmas

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…