This week's episode of 'Saturday Night Live' featured Joseph Gordon-Levitt as the guest host, who wow'd with his rendition of 'Make 'em Laugh,' the great song and dance number from 'Singin' in the Rain.'

Also, Al Gore stopped by Weekend Update to talk about the climate crisis, and there was a special message about Sarah Palin and Glenn Beck. Here's a round-up of 'SNL' skits from last night.This week's episode of 'Saturday Night Live' featured Joseph Gordon-Levitt as the guest host, who wow'd with his rendition of 'Make 'em Laugh,' the great song and dance number from 'Singin' in the Rain.'

Also, Al Gore stopped by Weekend Update to talk about the climate crisis, and there was a special message about Sarah Palin and Glenn Beck. Here's a round-up of 'SNL' skits from last night.

Cold Open: A joint press conference between President Obama and Chinese President Jintao touched on "Cash for Clunkers," the health care program, and the $800 billion owed to China by the U.S.



Joseph Gordon-Levitt Monologue: He was "a cute little girl" when he starred on '3rd Rock from the Sun,' but you might know him from the summer hit, '(500) Days of Summer.' Now his goal is to 'Make 'em Laugh.'



Palin 2012: Meet President-Elect Sarah Palin and her running mate, Glenn Beck.



Digital Short: Two Worlds Collide: Andy Samberg and Reba McEntire rap it out.



What Up With That? Al Gore, Mindy Kaling from 'The Office,' and Lindsey Buckingham stopped by.



Weekend Update with Seth Meyers: Al Gore says he'll get a little crazy to make his point.



Woman to Woman: You'll have to speak up!