Mariah Carey can be petty sha!

Mariah Carey keeps insisting she doesn't know who Jennifer Lopez is. And just in March 2016, she famously reignited her beef with JLo by insisting to a fan that she still didn't know Jennifer.

Turns out Mariah's fans are just as shady as she is and she loves it! She took a photo with a fan holding a sign that reads, "I still don't know her," while she held up her hand and shrugged.