Lil Uzi Vert seemed to reveal he's been collaborating with Grimes over the weekend, when he tweeted, "Me and grimes making hits. respect my sister."
Me and grimes making hits respect my sister. @Grimezsz— Uzi London (@LILUZIVERT) January 30, 2021
Although Grimes and Lil Uzi Vert haven't released a collaboration yet, Grimes did reveal in 2019 that she produced a whole EP for him, but he didn't even download the WeTransfer file when she sent it to him. Grimes told Zane Lowe, "[Lil Uzi Vert] asked me to produce an EP for him once and then I sent him the WeTransfer and he never downloaded it. And I was like, ‘Dude, I spent two weeks on this.’ It hurt my feelings."