We love everything about actress and creator of Flower Beauty, Drew Barrymore, including her laidback take on "business casual." If you want to break out your Birkenstock sandals again, and you're still at a loss of what to wear with them -- you can never go wrong with boyfriend jeans.

Trina Turk's archetypal style embodies everything California and Angeleno, so perhaps it wasn't surprising when models strutted out in sandals rather than stilettos at her spring/summer Fashion Week show. Burnished gold leather and funky grommets add a fun element to these Birkenstocks (and how about that striped pedicure!).

The thong style Gizeh Birkenstock is a favorite among the celebrity set, including designer Ashley Olsen. Un-fussy pieces like Olsen's breezy skirt and layered jackets pair perfectly with the effortless sandals.