Wedding updos can be elegant, sophisticated, and beautiful. Prom updos can be fun and flirty or classy and gorgeous. Similarly, hair updos can provide a casual look for day to day activities or a business look for work. Or, those looking for a little added sex appeal can experiment with a variety of hair updos to let the sultry side shine.One interesting variation of hair updos is the half up/half down style. These modified hair updos involve pinning up part of the hair while allowing the rest of the hair to flow around the shoulders or back. These hair updos can look stunning on a wedding day or they can look sexy for a night on the town.Generally, those using half up/half down style hair updos have medium to long hair, though shorter hair can still be attractive with these styles. Many women choosing to sport one of these hair updos, however, elect to add hair extensions to add to the contrast and beauty of the style. Half up/half down style hair updos can work with curly hair or straight hair and women with bangs can easily incorporate the hair cut into the style.Women with fine hair sometimes have a difficult time with half up/half down style hair updos because the pins holding it in place have a tendency to slip. Therefore, it is generally best to treat the hair ahead of time with plenty of gel and holding spray and to use many bobby pins.