Beautiful Bedroom Ideas Design for Teenage Girls Girls Room Design Ideas Modern Ideas For Twin Girls Bedroom In Many Colors Modern Accessories Tips For Girls Bedroom Teenage Girls Bedrooms How To Decorate Your Room. Teenage girls’ bedroom decor should be different from a little girl’s bedroom. Designs for teenage girls’ bedrooms should reflect her maturing tastes and style with a youthful yet more sophisticated look and need to be very stylish, modern, fashionable and vibrant with energy..Tumblr is a place to express yourself, discover yourself, and bond over the stuff you love. It’s where your interests connect you with your people.. Sharing a room as a teenager can be tough, but it doesn’t have to be ugly! In this pretty space, designer Kristina Crestin dressed two full sized beds in matching white ruffled bedding and plush fur throws, hanging each girl’s monogram above her bed for personalization..