Bollywood Hotty Kareena Kapoor has experienced coldest night of her life while shooting for Karan Johar's home production with beau Saif Ali Khan in Philadelphia.

According to sources, the couple spend their coldest night in heavy snowfall with a unit of 80 people.

Karan Johar's untitled flick is related to terrorism and is directed by Rensil D' Silva.

The sources further revealed that Bebo (nickname of Kareena Kapoor) has also experienced similar type of cold while shooting in mountainous terrain of Ladakh with the perfectionist Aamir Khan for the movie ‘3 idiots’.

Saif Ali Khan and Kareena Kapoor relations have always been the talk of the town.

According to rumor mills, the couple have purchased an apartment in Mumbai to stay there.

But that is not all, to keep the hearts worm with their love, the couple planned to take a week long leave starting from Christmas to New Year.

The couple have many big budget flicks lined up for release. Next Kareena will be seen in Kambakqt Ishq and Mr and Mrs Khanna.

Saif meanwhile is involved in shooting for his debut production with Deepika Padukone.