Buy a big bag, get your hair did, and scare yourself blind. SEE Terror Behind the Walls What: Tour the Eastern State Penitentiary. Why: Not the first but still the fifth-best haunted house in the state. When: Sun.-Tues., Thurs., 7-10 p.m.; Fri., 7-11 p.m.; Sat., 7 p.m.-midnight. Where: 22nd St. & Fairmount Ave. Tickets online at easternstate.org. DO Get Your Hair Done What: Blowouts at Studio C.L. Why: Curly, wavy, or straight hair that lasts all weekend. (Thank you, smoking ban!) When: Mon., Wed.-Fri., 9 a.m.-7:30 p.m.; Tues. & Sat., 9 a.m.-5:30 p.m. Where: 128 S. 19th St., 2nd fl. (215-496-0604). BUY Aleya New York Handbags What: Ultra-popular line in muted colors with braided details. Why: You’ll have a hard time finding these anywhere else. When: Your old one breaks. Where: Sugarcube, 48 S. 3rd St. (215-238-0825). EAT Dessert Crepes What: Banana, white chocolate, caramel, and vanilla in your fave French staple. Why: Treats and treats. When: Tues.-Fri., noon-11 p.m.; Sat., 10 a.m.-11 p.m.; Sun., 10 a.m.-10 p.m. Where: Beau Monde, 624 S. Sixth St. (215-592-0656). HEAR Swearing at Motorists What: Two-man rock band sings about the trials of life. Why: Might be a while before they play stateside again. Catch them while you can. When: Fri., 9 p.m. Where: North Star Bar, 2639 Poplar St. (215-701-1121). Tickets online at ticketweb.com.