Los Angeles, June 1 -- Netflix has officially welcomed Lady Gaga to the macabre world of "Wednesday", confirming her appearance in the show's second season during a theatrical reveal at the steamer's breakout "Addams Family" spinoff. The announcement coincided with the release of the season's gripping opening sequence and a theatrical, gothic performance by Gaga herself at the streamer's Tudum fan extravaganza at the Kia Forum in Los Angeles, reported The Hollywood Report on Sunday. Gaga made a grand entrance from a coffin bearing the inscription "Here lies the monster queen" on the lid and backed by a cadre of Addams Family-esque dancers, Gaga performed "Zombieboy" from her recently released album Mayhem. Following another dance performan...