Hiking does a body (and mind) good!

Selena Gomez took to the hills for a second day in a row after her return to LA following treatment for mental issues she was having last month. The singer-actress walked and talked with a friend; she was wearing sexy Puma leggings and a Fenty for Puma (aka Rihanna) cropped hoodie. Selena had on some cute round-lens sunnies.

Meanwhile, the night before, Selena was out on the town with friends, albeit in a low-key way. Gomez sneaked into Mastro's at the beach in Malibu wearing all-black, including a long duster jacket. She didn't stay too late -- she was gone by 9pm and hid -- ducking down in the front seat of a BMW SUV as her friend drove the gang home.

Why so secretive? And where's the smiley Selena we're used to? We're guessing she's taking a break from being the media-friendly starlet to focus inward and not let all the exterior noise get to her. She's just trying to keep it straight and stay healthy ... and good for her!