Kourtney Kardashian Rocks Short-Shorts in Calabasas

Kourtney Kardashian steps out to run errands on sunny Tuesday afternoon (June 27) in Calabasas, Calif.

The 38-year-old TV personality went simple and casual in a white T shirt, biker shorts, and sunglasses while she picked up her son Mason, 7, from his art class.

PHOTOS: Check out the latest pics of Kourtney Kardashian

Later that day, Kourtney took to Instagram to wish her younger sis Khloe a happy birthday.

“She always has my back, my ride or die forever. Happy Birthday @khloekardashian I feel blessed to live life with you by my side. Couldn’t imagine any of it without you. This picture though…” Kourtney captioned the below pic.