CNN  —  The madame of “Mayhem” Lady Gaga was again on the main stage at Coachella on Friday night for the event’s second weekend, and she didn’t let some momentary tech glitches stop her. As she did on the first weekend of the mega-fest in Indio, California , the Grammy- and Oscar-winner pulled off a showstopping opening that included her recent single “Abracadabra,” which had her head mic cut out for a few seconds. Gaga soon reappeared with a hand mic for the remainder of the song, before