Plot: Actor Alec Baldwin hosts; Jonas Brothers perform "Tonight" and "Video Girl. " Sketches include "Republican Congressional Leadership Meeting," "The Fourth Jonas Brother," "The Cougar Den," "Digital Short: The Jonas Brothers' Secret," "Sir Mix-a-Lot's Photo Shop," "Weekend Update" with guests Oscar Rogers, Angelina Jolie, Angie Tempura, and Joaquin Phoenix, "Vincent Price's Valentine's Day Special," "Planning a Meeting," "Wii," "Chewable Pampers Commercial," "Virgania Horsen's Hot Air Balloon Rides," and "First Coughs