Ricky Riccardi says Armstrong's innovations helped set the soundtrack of the 20th century. John Powers reviews I'm Still Here ...

We talk with author Ricky Riccardi about how Louis Armstrong became the first Black pop star and provided the foundation of improvisation for other musicians. Riccardi's book is Stomp Off, Let's Go.

From host Aidy Bryant's monologue jokes to Jesse Eisenberg shouting out Emma Stone, here are some of the show's most ...