The Fabulous Ms. Julie Newmar

Batman’s most beautiful archnemesis, Catwoman, still plays in high places, looking for her bat in the belfry!

"Gotham" Season 2 Episode 8 "Tonight's the Night"

At exactly one minute in, The Fabulous Ms. Julie Newmar (the original and best Catwoman) does a very quick cameo as a church organist. It lasts about two seconds. She was, in fact, formally educated as a pianist/keyboardist, from a very early age.