On 14 November, filmmaker Karan Johar hosted a big bash for American singer Katy Perry, who is in Mumbai to perform at the OnePlus Music Festival on 16 November. And a whole lot of Bollywood stars turned up for the party, including Aishwarya Rai Bachchan, Abhishek Bachchan, Alia Bhatt, Kajol, Karisma Kapoor, Arjun Kapoor, Malaika Arora, Gauri Khan, Shahid Kapoor, Mira Rajput, Kiara Advani, onakshi Sinha and many others.Some inside pictures and videos that are doing the rounds on social media are proof that it was a long fun night, where Katy mingled with the who’s who of Bollywood. In one particular video, which has gone viral on the Internet we can see Gauri Khan and Katy chatting away during the party.In another one, a selfie video, Arjun is seen addressing Abhishek Bachchan as Arjun Kapoor, thanks to a similar mustache he is currently sporting.Karan, Alia and Katy chat away during the party.Aishwarya posed with Katy Perry, and posted a picture on her Instagram account. “More Power to You.... 🌟🌈 💝Love n Light,” she wrote. We'll get through this! Meanwhile, here's all you need to know about the Coronavirus outbreak to keep yourself safe, informed, and updated. The Quint is now available on Telegram & WhatsApp too, Click here to join.