WATCH: Bizarre moment on Fox as host sings on-air about his desire to go to the bathroom

Four of the personalities on the Fox News program "The Five" were surprised when their colleague sang on-air on Friday.

The show was about to start the segment "One More Thing" when Greg Gutfeld voice rang out in song.

"I got to pee, I got to peeeeeeeeeeeeeeeeeee," Gutfeld sang.

"You're on the air," Jesse Watters noted.