NoahCyrus/Instagram Noah Cyrus is celebrating her “Big Boy Breakfast” moment as she shows off her curves in a see-through shirt. The 26-year-old singer updated her Instagram this week at a diner serving a “Country Kitchen” breakfast, giving a nod to her Southern roots while showing off her style. Flexing her biceps in her opening slide as she sat on a high stool, Noah upped the ante in a sheer top while going braless, exposing her chest as she c…