Ultimate Collection is a compilation album by the American singer-songwriter Aimee Mann.

Mann did not approve the release and sued the record company, Universal Music, for breach of contract.

In a statement on her website, she said that the record company, Universal Music, had refused her offer to choose tracks and provide artwork.

[4][5] Instead, the compilation includes songs Mann considered substandard, such as a rough mix, a song recorded from a live radio performance she did not authorize, and a cover song she recorded as a favor for a film producer friend.

[5] In 2001, Mann sued Universal Music, saying the release breached an stipulation in her contract that Universal could not release a compilation without her consent.