Lopez introduced Emme using the neuter pronouns they and them.
“So it was a very special occasion. They were very, very busy. Reservations. And it was expensive,” Lopez continued. “They cost me money as soon as they came out. But they’re worth every penny because they’re my all-time favorite duo duo.”
Amy then appeared on stage, holding a rainbow microphone and singing Christina Perry’s hit “A Thousand Years.”
Lopez shares Amy and twin brother Max with her ex-husband, singer and actor Mark Anthony.
CNN has reached out to Lopez for comment.