Aloha and Selamat Pagi.
This is called Hibiscus Rosa- Sinensis, or the Bunga Raya in Malaysian language, the national flower of Malaysia and also of Hawaii. A great looking flower which sprouts from a bush bursting in many colours, usually found in warm countries. If in dire straits you can use the crushed petals to condition your hair. I very much doubt that this will happen, as Tesco’s own shampoo costs as little as 50p.LOL. Also sold as an indoor plant in the UK, but unless you are greatly skilled and green fingered, you might not want to bother – mine was attacked by aphids. All the best!