From Batman: The Brave & The Bold:
Batman (Diedrich Bader), working undercover as Matches Malone, suffers amnesia and believes he really is a mobster. This prompts the Birds of Prey (Catwoman, Huntress, & Black Canary in this case) to try to solve the case themselves.
The hook to "The Mask of Matches Malone", however, is the cabaret number, with Catwoman (Nika Futterman) on lead vocals. Tara Strong & Grey DeLisle voice Huntress & Black Canary, respectively.
I have never seen this episode in its entirety. No rating.