 A first look of Chennai Express was released on 1 January 2013 . A thirty @-@ one second title track teaser , sung by S. P. Balasubrahmanyam , was released on 23 May 2013 . The official trailer of the film was released at an event in Mumbai on 13 June 2013 ; two days after its launch it exceeded four million views on YouTube . A platform running game titled Chennai Express : Escape from Rameshwaram , based on the film and featuring Shahrukh Khan & Deepika Padukone , was developed by Disney UTV 's digital wing , and launched on 24 July 2013 for Android systems . In the game , the player rides a virtual roller @-@ coaster , fighting off goons and dodging obstacles while they attempt to collect over 10 @,@ 000 coins in order to unlock Padukone 's game avatar . The outfits worn by Khan and Padukone in the film were auctioned ; proceeds from the sale were donated to a charity . The auction took place around the day of the film 's release . A Karaoke app developed by <unk> — a Swedish gaming studio — was launched on 2 August 2013 for Android and iOS based smartphones . 
