Farah Khan is so happy and satisfied with the "Happy New Year" title track that she woke up early in the morning with the song "playing in my head".

"So it's 5 a.m. and I have woken up because 'The Happy New Year' title track's been playing in my head all night! Vishal Dadlani, thanks," Farah posted on Twitter Monday.

The film, which is still being shot, features Shah Rukh Khan, Abhishek Bachchan, Sonu Sood and Deepika Padukone. It is slated to release around Diwali this year.