Roos is a singer and has played at many venues across UK, The Netherlands, Sweden and France. She has sung at weddings, corporate events and regularly sings in hotels in central London such as Park Plaza and The Montague. Some bands she played/play for are: The Lollipops, Sam & Roos, Daisy Roots, The Rhapsodies and SOUND.
Roos is also a singing teacher and choir director. She has got a degree in voice & production. From then on she has run ‘The Bridge Choir’ in London Bridge, "All The Voices' in Manor House and 2 children choirs in Canary Wharf. She also taught singing and beginner piano at the ‘The London School of Arts’, and gives music, dance and drama lessons in nurseries across London, through the agency ‘Lucy Sparkles & Friends’.