In August, she recorded and performed "Nenjae Ezhu", a song composed by A. R. Rahman – her first Tamil song for the opening performance of International Superstar 2015, an international Indian singing competition. In October, Siti was inducted in the 2016 edition of The 500 Most Influential Muslims. In the same month in Singapore, she shared an award with Cakra Khan from Indonesia in the category of Best Collaboration (Artiste) for their duet, "Seluruh Cinta" from the 2015 installment of Anugerah Planet Muzik. In the following month, she embarked on her second concert at Istana Budaya in 2015 on 7 and 8 November with Konsert Satu Suara, Vol. 2. Accompanied by Hetty Koes Endang (Indonesia) and Ramli Sarip (Singapore), the two-day concert was a commercial success, managing to collect more than RM 650 000 from tickets alone.