After the "Vampire" singer, 21, shared that one of her dating "red flags" is if a guy says he wants to go to space during an interview with Netflix posted on Instagram on Friday, Nov. 1, the "Oblivion" musician, 36, appeared to be aligned with her, seemingly trolling her ex Elon Musk on Sunday, Nov. 3.

Is that a not-so-veiled shot at Elon Musk? Grimes, who dated the SpaceX founder on and off for four years, appears to think so — and she agrees. “It’s true,” she wrote on X. “Only women should be going to space.” (Now we know her favorite Janelle Monáe song .)

Grimes and Musk, who were first linked in 2018, share three children: son X AE-A-Xii, daughter Exa Dark Sideræl and son Techno Mechanicus. In 2022, Grimes revealed that the couple had split and a year later, referred to their relationship as " the best internship ever. ” She went on to praise Musk’s continued efforts with his aerospace company.

Grimes weighs in on 'Vampire' singer Olivia Rodrigo's red flags in the trailer for her new Netflix doc chronicling her Guts World Tour.

Grimes gave her stamp of approval to singer Olivia Rodrigo's biggest dating red flag in an apparent dig at her ex, billionaire Elon Musk.