Fooled by her dainty looks, you might want to dismiss Shibani Kashyap  as just another wannabe Bollywood singer or a Sheryl Crow  look-alike who is riding high on the strength of a pretty face.   That is, only until she opens her beestung lips and belts out a foot-tapping, sizzling number like 'Zinda hoon Main' , that you you discover that she's an extremely talented vocalist and singer.   Shibani sings like a soprano, plays a mean guitar, writes her own lyrics and exhibits a remarkable talent in her compositions.   Here Kashyap speaks about her fitness strategies, beauty secrets and how she keeps her voice healthy .