Brazil’s first lady Rosangela “Janja” da Silva on Saturday insulted Elon Musk, the billionaire owner of X, at an event ahead of the G20 summit in which she advocated tougher regulation of social media.Speaking on a panel about disinformation, she appeared to be startled by a loud noise.”I think it’s Elon Musk,” she said, adding, “I’m not afraid of you, fuck you, Elon Musk.”A video of the episode quickly spread on X, drawing a response from its outspoken owner.”They are going to lose the next election,” Musk wrote, adding a pair of laughing emojis.The tycoon and soon-to-be member of US…