Justin Bieber went for a hike at Runyon Canyon in Los Angeles on Saturday, and if he wanted to hide his acne flare up, this was really the wrong place to do. Seeing as Runyon is one of the most popular trails in town, he should have gone to Griffith Park instead -- it's not such a social scene!

After going for a walk, the pop star made his beefy bodyguards carry a handful of palm fronds to shield him from photographers, but we still got a peek. Yikes! At least he didn't pull a Zac Efron and wear foundation to cover it up, so kudos to him on that front. Breakouts happen to the best of us, so now we wonder if the Biebs might get approached by Proactiv. Hey, Adam Levine did it, and seeing as he's married to a supermodel, he's way more of a rock star than Bieber.

Later in the day the 20-year-old superstar went shopping for shoes with Kris Jenner's boy toy Corey Gamble, and after that he went to Spago for a late lunch, where he hid his face yet again, this time behind a set of menus. Poor guy! We're sure girlfriend Hailey Baldwin still thinks he's a babe though...