Late Night Highlights: Larry King Does Stand-Up, Denounces Viagra on The Tonight Show

Newly retired CNN newscaster Larry King took his suspenders to The Tonight Show last night to premiere his stand-up act and reveal that he is completely erectile functional. Elsewhere, Chelsea Handler scolded P. Diddy for being late (and drunk), Conan O'Brien premiered his Christmas decorations and Tom Arnold told a story about being stabbed by Roseanne over a box of cookies.

4. About That Time Roseanne Barr Stabbed Tom Arnold Over a Box of Cookies

Tom Arnold told George Lopez the story on last night's Lopez.

3. Punishing P. Diddy

Chelsea Handler gave P. Diddy a hard time last night when the rap legend showed up an hour late and inebriated to tape Chelsea Lately.

2. Conan Decorates His Set

Last night, Conan enlisted the help of an eccentric Christmas decoration artist named Kenny to give his set that yuletide je ne sais quoi. In the first video, Conan meets with Kenny. In the second video, Kenny and Conan unveil the new holiday set, which is easily the most impressive Christmas late night set of the season.

1. Larry King's First Stop After CNN

The freshly retired newscaster visited The Tonight Show last night to debut his stand-up act (first video), brag that he never needed Viagra and then discuss his talented impressionist son Cannon (second video).