An artificial form of tourette syndrome in which the singing or speaking of a line from a song by one individual produces the spontaneous and not entirely voluntary singing or speaking of further lines of said song by another individual. This phenomenon is most often seen among people in good moods.

A person who gets the vaccine and and flaunts it will high end shopping, trips, and parties

being unable to control the temptation of suddenly bursting into song

To randomly break out in song