Article continues below advertisementBillie Eilish isn't holding back when it comes to her feelings about Elon Musk.The "Birds of a Feather" singer launched a scathing attack on the tech mogul in a series of fiery Instagram Stories shared Thursday, November 13. Her tirade began with a reshare of a post titled "Elon Musk became the world's first trillionaire, here's what he could do with it," which featured a photo of Musk looking contemplative.Article continues below advertisementSource: MEGABillie Eilish slammed Elon Musk's wealth on Instagram.