Playboi Carti took to Instagram earlier this month to both announce, and tease, the release of a new collaborative mixtape with Lil Uzi Vert. Leave it to Carti to be vague about when a project of his is going to actually drop, but the Atlanta rapper did take to Twitter today with another message.    Uzi Carti * Carti Uzi * Tape ... loading — #cashcarti #playboi (@playboicarti) September 29, 2017   Carti rarely tweets, so we can only hope this is a sign that the mixtape might actually be coming soon. Maybe a tour to go along with it? Stay tuned for more details.