Article continues below advertisementMariah Carey seemingly reignited her feud with Jennifer Lopez years after her infamous "I don't know her" comment went viral.The "Always Be My Baby" singer, 56, spoke to Andy Cohen about her history with J.Lo, 56, during an appearance on Watch What Happens Live on Wednesday, October 1. During the interview, the talk show host, 57, asked about Carey's "I don't know her" comment from 2003, when she was probed about Lopez during an interview with a German media outlet.