The Delhi-born newcomer said that working with the fourth-generation star on the soft drink campaign made him forget his dialogue.
"Working with Kareena on the Limca ad would be a dream project for anyone, but getting so much footage is the cherry on the cake. Kareena is so natural with her acting that I was actually blushing in front of her while she was saying her dialogue and looking at me," revealed Bagri.
"As a matter of fact, twice I got lost and forgot my lines, distracted by her pretty face. I guess now I have a huge crush on her."
Bagri added: "In the ad Kareena says 'Pyaas Badhao' and she pushes me to do more. I actually feel the same in real life because this experience is really pushing me to do more."
Since relocating from Delhi to Mumbai just over a year ago, the 24-year-old has fronted 50 television and print campaigns, including adverts for Cadbury, Reliance and Blackberry.
Users on Facebook and Twitter have made comparisons between Bagri and the Ek Main Aur Ekk Tu actress's ex-partner Shahid Kapoor.
Bagri went on to say: "Some people say I resemble Shahid Kapoor, while others have said I look like a young Tom Cruise.
"Although I take both as a compliment, the only name I want to be compared to in the industry is my own - Ansh Bagri."
The model-actor is reportedly in talks with several directors interested in launching his film career.
Watch the 'Pyaas Badhoa' Limca advert below: