Liu's side bun is a great, no-hassle style. You can get the naturally tousled look by securing slightly damp hair into a tight bun and sleeping on it. Just re-secure it into a looser side bun the next morning, and you're ready to go! Or if you have a little more time, curl your hair with an iron, secure into a bun, and bobby pin the loose ends.

Ferrera perfects this romantic half-updo, and so can you. Take the top half of your hair and sweep it over to one side of your head (near your ear). Pin it into place with a large barrette or jeweled clip, and loosely curl the ends of your hair. Bobby pin any loose strands away from your face for a more polished look.

Underwood's side ponytail is so simple, yet so chic. Start off by securing your hair into a ponytail. Then use an iron to curl just the ends of your hair, letting the ponytail fall loosely over your shoulder. Finish with a light misting of curl shaping spray (try Garnier Fructis Style Curl Shaping Spray Gel, $3.49).

Tisdale's multi-tiered ponytail works best if you start by sleeping with your hair in a bun overnight. When you wake up and let down the bun, you'll have perfectly messy ends. To create the style, first secure hair into an off center ponytail. Next, secure another elastic halfway down the length of your hair. Backcomb the hair between the two elastics to create the messy finish. Complete the style by applying a smoothing cream (try Pantene Pro-V Smoothing Frizz Defense Creme, $5.99) to the top of your head.