It’s “I’ve Been This Way Before” — Claire, played by Kate Hudson, sings it at Mike’s funeral in Song Sung Blue. The scene is framed as a tribute and farewell, and one source also notes that Mike had previously performed “Song Sung Blue” at AA meetings, tying the funeral moment back to his life story.

Scene context

  • The funeral performance is meant to honor Mike directly.
  • It’s one of the film’s most emotional musical moments.

Song detail

  • Song: “I’ve Been This Way Before”.
  • Performer in the scene: Claire / Kate Hudson.

TL;DR: Mike’s funeral song is “I’ve Been This Way Before.”