Miley Cyrus showed off her super-slim stomach in this underwear shot she posted on Instagram on Dec. 1, 2014. Brushing her teeth and taking a selfie with her gold iPhone, Miley called out her pal, the Flaming Lips' Wayne Coyne. "When I'm up I never wanna go to sleep. when I'm sleepin I never wanna get up, I tink dat is healthy. & means I'm always lovin what im doin 🌞🌞🌞 @waynecoyne5 true," she wrote.