Which singer became the partner of billionaire Elon Musk in 2018?

Claire Elise Boucher (born March 17, 1988), known professionally as Grimes, is a Canadian musician, singer, songwriter, and record producer. Her music has incorporated elements of varied styles, including dream pop, electronic, R&B, and hip hop, while touching on science fiction and feminist themes. She has released five studio albums.

In 2018, Boucher began a relationship with technology entrepreneur Elon Musk. They met after discovering on Twitter that they both came up with the same pun relating to Rococo (ornamental and theatrical style of architecture) and the thought experiment Roko's basilisk.

On May 4, 2020, she gave birth to her and Musk's son, whom they named "X Æ A-12" (pronounced "Ex Ash A Twelve" or "Ex Ay Eye"). The name reportedly violated the naming law in California, where the child was born, and was subsequently changed to "X Æ A-Xii". According to an image of the birth certificate, the letter "X" is the child's first name, and "AE A-XII" the middle name. He is Musk's seventh child.