Actress Bipasha Basu is on cloud nine as the trailer of her forthcoming film 'Alone' has been viewed more than four million times on YouTube.

Published on Dec 9, the trailer has been viewed 4,058,867 times and has received thumbs up from celebrities like Shah Rukh Khan, Priyanka Chopra, Hrithik Roshan and Arjun Kapoor.

"Our trailer of #Alone is the fastest to cross the 4 million mark! Woohoo! Now keep 16th jan to watch the film!," she tweeted Wednesday.

Also starring Karan Singh Grover, the story revolves around conjoined twins Anjana and Sanjana, who had promised to be together and how the death of one sister leads to a series of chilling incidents.