The 45-year-old "Infinity" singer was leaving The Beverly Hills Hotel when she told TMZ, "I still don't know her" in response to their query about Lopez.
Carey famously claimed to not know Lopez in the early 2000s, sparking years of feud rumors between the two stars. Lopez addressed the comment on Watch What Happens Live last week after telling Wendy Williams she and Carey have "met many times."
"There isn't [a feud]," Lopez told host Andy Cohen before explaining why she's attended nearly every Las Vegas residency show except Carey's.
"I think last year when [Mariah's residency] started I was already here in New York filming Shades of Blue and doing [American] Idol on the weekends," she said. "Then I started preparing my own. I don't think there's been a time when I could have seen it."
Carey previously told The Cut she "really wasn't trying to be funny" and "was just being honest" when she made the initial comment. The singer kicked off her Mariah Carey #1 to Infinity residency show at Caesar's Palace in May and will bring it to a close Sept. 11.
Lopez, meanwhile, is in the midst of her All I Have residency at The Axis at Planet Hollywood, where Britney Spears also performs. The show began Jan. 20 and will run through Dec. 17.