When you want to wear something easy, you can't go wrong with a Little Black Dress (LBD). This textured dress from Rebecca Taylor is ultra flattering, with cap sleeves and a small ruffle at the hem. It runs large, so size down. I'm wearing a size zero for reference.
Dress: Rebecca Taylor Cap Sleeve Structured Textured Dress
Shoes: Alexandre Birman Ellie Sandals in Black and Gold