…wait, i met Sprout when she was a filly! her family was going to move to Ponyville, along with her friend Pretty Pink's family! and her cutie mark was an onion, not a music note!!
as it turns out, Sprouting Bulb is nothing more than the disguise of Spinneret, a changeling who deserted from the hive after the brutality of the Canterlot Wedding. many changelings were lost, including ones she saw as friends…with nowhere else to go, she set herself up in Ponyville, now living off one feeding a day. the rest is true, though. she does want to be a pop star, to give a voice to other changelings like her, to let the world know that not all of them are still loyal to Chrysalis.