Miranda Kerr Celebrates Her Birthday Upside Down!

Miranda Kerr turned 38 years old yesterday and is celebrating the big day with a quick pilates workout in Kourtney Kardashian's backyard of all places. Kourtney recently celebrated her own birthday by spending time with her new boo Travis Barker, who had a plane fly by carrying a happy birthday message to his girl.

The model threw a little tea party last week to celebrate her Kora skincare line, inviting friends like designer Jeremy Scott, Olivia Munn and fellow model Jasmine Tookes. See some more Miranda Kerr birthday updates in the gallery!

_{Photo Credit: Instagram}