Mariah Carey can be petty sha! See what she did with a fan...lol

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.