There's a great article here on a few celebs and how they dress it up or own it dressed down. I took my own stab at it below. Red had to be involved.
Also, on a similar topic, those starfish studs are from Gorjana. I picked them because I felt like the shirt had a coral-ish/nautical theme and I was trying to tie it all together. I've mentioned Gorjana's pieces before here. They're a great go-to line for inexpensive jewelry that's on-trend but not too trendy. And that's a fine line, ladies. And they're having a sale right now site wide--30% off with the code SWEETESTTHING. You're welcome.