"Say Goodbye" is a song by British pop music group S Club, released as a single from the compilation Best: The Greatest Hits of S Club 7.

The final single released before the band's split, it was released on 26 May 2003 as a double A-side with "Love Ain't Gonna Wait for You" in the United Kingdom and Australia; in other territories, it was issued alone.

The music video showed the group packing up their things into boxes as if they were moving out of the house.

While doing this, they look at photographs taken during their performances, photoshoots, as well as other events that they had experienced.

Credits are lifted from the UK CD1 liner notes.