On Saturday (Aug. 16), the 31-year-old pop superstar shared a series of Instagram photos from a night out with friends at a Los Angeles bar. In one candid shot, Justin - sporting a shaved head and light tank top with baggy pants - appears slightly confused as Jenner, 29, animatedly gestures beside him, seemingly mid-story.

Over the past few months fans have been harboring concerns over Justin's health owing in part to his gaunt, hollow-eyed appearance.