This weekend brought out the selfie-lovers with stars posting photos of themselves to Instagram. Particularly impressive: Hilary Duff's through-the-mirror photo of herself wearing a scalloped black bikini that highlighted her defined abs. "Hey #moms #westillgotit ❤️ #loveyourbod," she captioned the shot (above). Selena Gomez, Alicia Keys, Debra Messing, and Jessica Simpson also had selfies to share. See them and more of our favorite celebrity Instagrams from the weekend below!