Qatar's ruling Emir Tamim bin Hamad Al-Thani's sister Al Mayassa bint Hamad Al-Thani attended 'pink ball' co-chaired by Isha Ambani at London's British Museum. She shared pictures from the event, with one showing her posing with Isha and Nita Ambani. This was the first edition of the annual fundraising event, which is being called a rival of US' Met Gala.