TBS late night host acknowledges similarity to 'Jimmy Kimmel Live' skit, blames incident on a staffer's oversight.

Conan O'Brien issued an apology to Jimmy Kimmel on Thursday after learning that a Dec. 22 "Rudolph vs. Sarah Palin" satire on Conan was too similar to one featured on Jimmy Kimmel Live two weeks ago.

See O'Brien's apology below.