Mike Wass By the time Kiddo A.I. put pen to paper on a new verse for Rema’s “Calm Down,” the mellow afrobeats banger had already amassed hundreds of millions of streams and propelled the Nigerian artist to global stardom. If that wasn’t intimidating enough, the Miami-based songwriter had to capture the voice and allure of childhood hero Selena Gomez, who had been attached to the remix. She turned it around in a couple of hours. Amanda Ibanez, her real name, was given the career-making opportunity by Interscope Records senior director of A&R Vanessa Angiuli. A month or so after connecting, the executive fired off a text asking if she would take a stab at writing a spec verse for Gomez. “I read it and freaked out — obviously,” Kiddo A.I., 26, remembers. “I ran up to my room and got on Logic, set up my mic. I was so nervous that I sent two options.”