Hairstyles for teenage guys are dapper than ever with an endless choice of cool haircuts. From long to short, teen boy hairstyles can be an awesome mix of. Sep 3, - Trendy Hairstyles and Chic Haircuts for Teen Girls. #2: Sleek Mediun Haircut. The newest trend is healthy hair. #3: Short to Long Bob. #4: Asymmetrical Bob with Highlights. #5: Short and Wavy Shag. #6: Trendy Grey Pixie. #7: Bob with Shaved Side. #8: A-line Brown Bob. #9: Wavy Bob with Highlights.