After Grimes revealed Thursday that she had welcomed a second child with Elon Musk but broken up with him for a second time, a new report says that the musician has turned her romantic interests. GRIMES is reportedly dating whistleblower Chelsea Manning after her second split with Elon Musk. The news comes a day after Grimes revealed she and the tech mogul welcomed their second daughter, Exa Dark Sideræl Musk, last December.