when Udays chopra receives a call from his best friends Anjali i.e the introduction scene of the new actress . U see her walking around with the phone in hand. If u look very carefully, u will see that the chord of the phone is not even connected. It is being dragged by her.
Before the title song, Uday Chopra says that it is his best friends' wedding, but he is not happy for her. But in the song, he sings "jahan bhi yeh jaaye, yeh khushiyan hi paaye, mere dil ne duaa di hai" (which translates simply as "I wish them all the best and all the happiness where-ever they go"). If he wasn't happy for his friend, than how can he wish her all the happiness in the world all of a sudden?