Actress Parineeti Chopra and Arjun Kapoor announced the opening of the festival.
Arijit took to the stage and set the mood right as he crooned the "Ae Dil Hai Mushkil" title track and then went on to sing his other popular tracks.
Sonakshi entertained the audience with her rendition of "Har Kissi Ko Nahi Milta".
Music-composer trio Shankar-Ehsaan-Loy enthralled everyone with their hit songs like "Kal Ho Na Ho", "Breathless" among others.
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Her act was followed by Bachchan's performance with the Shillong Choir.
Farhan took the stage by storm with his performance on "Rock On" title track and "Maston Ka Jhund".
Shraddha, who joined Farhan for the act, also crooned songs from her blockbuster movie "Aashiqui 2".
The Global Citizen Festival, a charitable event is being held at the MMRDA grounds in BKC where over 80,000 people are expected to attend.
The other performances lined up are Coldplay, Jay-Z, Alia Bhatt, AR Rahman, Ranveer Singh, Ayushmann Khurrana, The Vamps and others.
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