The Amazing Stickie has amazing arms, natch. One way she keeps them amazing is by doing YTW. (The exercise is named for the shapes the arms make. Neither Stickie nor I can say why that W is not an M.) (You can feel free to call it whatever you like!)
Stickie begins in a slight squat. She raises her arms, with or without small weights, into a Y shape with her upper arms in line with her ears. Then she opens her arms out into a T shape. Finally, she bends her elbows so that her upper arms stay parallel to the floor and her forearms point down toward it.
Ten or so reps should do it.