Kareena, Saif celebration time in London

Bollywood actress Kareena Kapoor flew down to London to celebrate husband Saif Ali Khan's 44th birthday on Saturday and her step-daughter Sara Khan also joined in for the celebration. It was double celebration time for Kareen as her recently released film 'Singham Returns' has created magic on the box office. Ajay Devgn starring 'Singham Returns' has become the highest crosser of this year. In just two days, the film has collected around 35 crores. On the success of the film Kareena said, "The film's success is a combination of Rohit, Ajay and me. It's a hat trick with them." For the birthday celebrations, Kareena called up Saif's school friends and his daughter Sara Ali Khan.