Mimiyuuuh, comedy-queen YouTube favorite and celebrated Preview cover girl, not-so-secretly nurses a level-1000 mastery of cute, clever layering. In fact, consider that an understatement—she's so good at it. While Mimi's definitely all about cool piling, this trick is clearly her particular favorite: Why not throw a strappy top over a sleeved one?
Note that her choice of crisp-cum-dainty fabrics is key here. That abundance of smocking and frills is thoughtful and deliberate. Remember, this ain't your ordinary tank-and-tee throwdown. Also, don't bother tucking in the shirt you have on underneath! Let that strategic play on lengths tease the eye.
Undone yet demure. Bonus: Feel free to try it with blazers, bustiers, and dresses, too.