Ashley Tisdale has got a medium and wavy Hairstyle which is a great way to include volume to the hair. First part the hair to the side immediately getting out of the shower. Then apply a volumizing mousse to damp hair starting from the root to tip and blow dry with sing a diffuser to get the natural waves. After the hair becomes completely dry, wrap small sections of the hair around a 1-inch curling iron to get voluminous waves. Finally use the finger to comb the waves and mist all over the hair using an anti-frizz hairspray to tame the flyaways.