Why couldn't Deepika Padukone stop giggling on sets of 'Tamasha'?

Deepika Padukone and Ranbir Kapoor in a candid behind-the-scene moment from the set of their film, 'Tamasha'

Deepika Padukone and Ranbir Kapoor in a candid behind-the-scene moment from the set of their film, 'Tamasha'.

Watch: 'Tamasha' trailer is out!

Dippy can't stop giggling while co-star Ranbir does a touch-up for a shot.

Was it Ranbir Kapoor or someone else that she found amusing?

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