8. WWE Superstars Sing Karaoke (Lopez Tonight)
When it debuted: 2009
Segment lowlight: David Otunga sings "I'm Telling You." (Yes, that "I'm Telling You," by Jennifer Hudson.)
George Lopez's notoriously terrible talk show could probably fill a 25 worst segments list all on its own. One of the standouts among the bottom-feeders is the entire week George had pro wrestlers sing karaoke.
Normally late-night shows feature celebrities exhibiting their lesser-known talents. This bit attempted to show off a lack of talent that we all already assumed. The only positive thing that we can say is this bit wasn't racist, which was not true of a number of Lopez's other nuggets of comedy gold.