Ashley Tisdale ditched her rockstar beau Martin Johnson for the day, and instead, spent the afternoon with her girlfriend.

Tisdale rocked a flowy white top and skirt ... mixing it with a floppy hat and scuffy black boots. Not sure about those boot buckles, Ash!

The former High School Musical hottie has just landed a role in a new CBS comedy pilot which will focus on "creative young people that are trying to achieve their dreams during these tough financial times."

We're lovin' that the Tis is showing a lot of leg. You go, girl!