In Katana's debut appearance, her few lines were voiced by Vyvam Pham.Subverted in practice - as heard in both 'Mayhem of the Music Meister' and this very episode, Canary's singing voice works just fine (no problems from abusing her vocal cords with that 'canary cry' of hers, it seems) - but then that's Catwoman for you.

However, Black Canary's voice actress, Grey DeLisle, is a Grammy-winning professional singer. Irony as She Is Cast: The episode 'The Mask of Matches Malone!' features a scene where Catwoman jokingly suggests that Black Canary being gagged by the bad guys is a good thing as they no longer have to listen to her terrible singing, much to Canary's displeasure.Superman got his first appearance in the episode 'Battle of the Superheroes!'. She and fellow former exile Superman were seen from behind in the Cold Open to 'Sidekicks Assemble!'.Played with in 'Mayhem of the Music Meister!' where a picture of Wonder Woman is seen in Music Meister's Death Trap room, only to have her face obscured by other concert stickers so that you could only see her hair and trademark tiara.

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