Song structure

A bridge may be a transition, but in popular music, it more often is ``...a section that contrasts with the verse...(,) usually ends on the dominant...(,) (and) often culminates in a strong re-transitional.'' ``The bridge is a device that is used to break up the repetitive pattern of the song and keep the listener's attention...In a bridge, the pattern of the words and music change.'' For example, John Denver's ``Country Roads'' is a song with a bridge while Stevie Wonder's ``You Are the Sunshine of My Life'' is a song without one.

Question: do you need a bridge in a song
Answer: no