The 15th and final bittersweet season of American Idol is almost over, and all season long, Yahoo Music’s Reality Rocks has been asking alumni to share their stories. Today, Season 8’s Allison Iraheta, who was 16 when she competed on the show seven years ago and now sings with Idol musical director Rickey Minor’s house band, pens one of the most candid and in-depth essays yet. American Idol is the Cinderella story.