 Complete the following phrase:  In addition to singing for films, Rao has supported charitable organisations for a number of causes. In March 2010, she appeared on NDTVs Greenathon, an initiative to support eco-friendliness and investigate poor electricity supplies in rural villages, to lend her support. In October 2011, Rao performed the track Haseen Zindagi along with Teesha Nigam, Shruti Pathak, Neha Bhasin, Shefali Alvares and Akriti Kakkar, composed by Sonu Nigam for the project in aid of breast cancer awareness. She performed in Delhi at the 100 Pipers Play for a Cause which is a musical extravaganza dedicated to raising funds for people affected by the 