Joseline was ACTING UP on Instagram last night. She went off and sang Cardi's diss track - and Cardi offered her a FADE.
This is what Joseline posted at around 7 pm.
And here's Cardi's response - less than 15 minutes later:
Joseline kicked this all off with the release of her diss track on Cardi B. And her baby daddy Stevie J has given her up, saying the reason she did it is that she's jealous of Cardi's unbelievable success, even though they both did time on reality TV.