Dieck as the Joker, alongside Mueller as Harley Quinn, ambushed Capital Indoor Stadium Friday with a chaotic rhythm dance that would make Commissioner Gordon do the twizzles. The dastardly German duo ...

Those theories were soon confirmed, as Lady Gaga was reported to be playing Harley Quinn, the Joker's love interest. In the comics, Harleen Quinzel is a psychiatrist the Joker falls in love with ...