Cutie Ashley Tisdale gets the giggles as she leaves a hair appointment at Byron & Tracey Salon in Beverly Hills on Friday night (November 20). The 24-year-old actress/singer, carrying a large YSL “Muse” bag, is set to rock out The Citadel in downtown Los Angeles during the 8th Annual Tree Lighting TONIGHT! Ashley tweeted from the hair salon, “The best part about being at hair salon after hours is eating pizza blasting lady gaga, makes the whole process so much more fun!” The Tiz just updated her Twitter again, excited for tonight: “Can’t wait for the show tonight! Had a great soundcheck now lets get the party started.” source.