"Cowgirl Bobs" Are Having a Moment Thanks to Megan Fox

This wavy version of the trend is the perfect way to style your hair for that effortless, just-woke-up look.

"To style, apply a heat protectant and follow up with the R+Co Dallas Thickening Spray ($34) at the root for root lift," Federico says. For extra fullness and texture, go in with a foam like the Bumble and Bumble Thickening Full Form Soft Hair Mousse ($35). "Blow dry with a large round brush to polish the hair and build volume and movement."