But after reading the “Hannah Montana” pilot, she didn’t think it aligned with her and sister AJ Michalka’s musical goals. “[I was like], ‘Wait, but I’m doing music as Aly ...

Aly & AJ were writing “What It Feels Like” — a song about learning to admire “the beauty” of their physical changes — when Aly went into labor with her son Jack. On Friday, the sister ...