Coco Mademoiselle is a gorgeous fragrance, but if in doubt, nip into a store i.e. Debenhams, and have a spritz.
Also Jo Malone, Cardamom and Mimosa, my latest find, is a lovely summer fragrance. Bottega Veneta is also gorgeous. All lovely and summery.
The secret to buying fragrance is to spray it on your skin, and leave it for about 20- 30 minutes to let it settle as it changes, sometimes dramatically depending on your skin i.e.: oily skins reacts differently to dry skins where fragrances are concerned. Do NOT rely on the little testing cards that you will be offered to test a perfume, they are NOT like your skin.
Also, as you get older, what was once your signature scent may no longer suit you. I always wore Opium, Paloma Picasso amongst other quite heavy fragrances ( with one exception, 'Poison', now THAT always makes me feel sick, dreadful scent !! ) when I was younger, but now, they do not work for me at all.
It is what makes you feel good at the end of the day Oriel, so get yourself out to the nearest department store, and start spritzing and take your time about deciding.
Good luck 