Article continues below advertisementKesha just cranked up the heat online.The "Praying" singer, 38, had Instagram buzzing after dropping a flirty mirror selfie from what looks like a swanky hotel bathroom. Wrapped in nothing but a loosely tied white towel, she showed off bare shoulders and a hint of side chest while snapping the shot.Article continues below advertisementWith damp, messy hair and a fresh, makeup-free glow, the golden lighting bounced off the marble walls, giving the entire scene an effortlessly glamorous vibe.