Neha Dhupia's mysterious hair challenge!

Here's what your favourite celebrities have been up to.

Neha Dhupia poses for shutterbugs at the Mystery Shampoo Challenge Event in Mumbai.

The ad campaign is looking for a new face to promote the brand.

Speaking of hair, Vivek Oberoi should trim his, pronto! The actor is spotted looking hairier than usual at the launch of a special book on autism penned by Kavita Shanbag.

The book launch coincided with politico Asif Bhamla's birthday and the 12th anniversary of his NGO 'We Love India'.

Also in Mumbai, Urmila Matondkar is spotted at the launch of Areopagus spa.

Meanwhile in Tokyo, Angelina Jolie arrives with her children Maddox, Zahara, Pax Thien and Shiloh (left to right) at the New Tokyo International Airport in Narita, on Monday.

Jolie flew into Japan on Monday to promote her movie Salt.