Actress Sonakshi Sinha, gives a special appearance in rapper Yo Yo Honey Singh's song, "Party all night" , with Akshay Kumar, which is being said as the most expensive song ever shot in Bollywood (Rs.6 crore). 600 foreign models were also hired as background dancers for the song choreographed by Sumit Dutt ('Dhinka Chika', 'Character Dheela' fame) & Raju Khan.