Mariah Carey has reignited her feud with Jennifer Lopez by insisting she "still doesn't know" her fellow diva, RadarOnline.com can reveal. Smiling, she replied: "I don't know her." And on Wednesday, she reiterated the sentiment, after Cohen asked: "Can you believe how much 'I don't know her' has become part of the lexicon?" She replied: "The thing is, I was being honest when I said it, so I don't know how it became so big. Carey replied, flashing a knowing smile as Cohen laughed.