Salman Khan celebrated his 50th birthday with the contestants of reality show Bigg Boss 9.

The housemates had a surprise planned for the superstar -- they had set up a treasure hunt inside the house and he had to navigate his way to it, following the clues.

A look at the pictures of the *bigg* birthday celebration:

Looks like Mandana Karimi can't take her eyes off Salman.

Is she Salman's favourite contestant on the show?

The housemates -- Rishabh Sinha, Gizele Thakral, Kishwar Merchant, Nora Fatehi, Prince Narula and Mandana -- flank Salman.

It was a double treat for the contestants as they celebrated Christmas and Salman's birthday inside the house.

Suyyash Rai dressed as the Reindeer and Keith Sequeira was Santa Claus!

The 'Santas' bring in Salman's birthday cake.

Within four minutes, Salman drew a picture of Jesus Christ on the white canvas and gifted it to the housemates. Rochelle Rao looks on as Salman puts on his artistic mode.  

Here's what he drew.

The contestants write their birthday wishes for Salman.