"Okay... Baad baad time to get the stomach flu! What is with me... I hate being sick and travelling, " Sonam posted on social networking site Twitter.
The actress loves spicy and crispy Uncle Chipps.
"I love spicy treat from Uncle Chipps, they don't have it in Mumbai... a friend gets it for me from Delhi... major brownie points for that, " Sonam had posted.
It seems the chips might have taken a toll on her health.
"Mausum", being directed by veteran actor Pankaj Kapoor, also features Shahid in the male lead.
The cast and crew were meant to start shooting in Scotland in April but it was cancelled due to ash-clouds over Europe.