Saturday Night Live: Ryan Reynolds/Lady Gaga

Actor Ryan Reynolds hosts; Lady Gaga performs "Paparazzi" and a medley of "LoveGame," "Bad Romance," and "Poker Face."

Sketches include "Obama's Unfinished Business," "Mostly Garbage Dog Food," "Celebrity Family Feud," "SNL Digital Short: On the Ground," "Mike's Fountainry," "Deep House Dish," "Weekend Update" with Arnold Schwarzenegger, Charles Barkley, and the Ahmadinejads, "So You Committed a Crime & You Think You Can Dance?" "International Masterworks," and "Backstage SNL: Lady Gaga and Andy."