Aishwarya Rai
Aishwarya Rai as the brand ambassador of Kalyan Jewellers (Facebook/Kalyan Jewellers)

Aishwarya Rai Bachchan has retained her crown as the "world's most beautiful woman", going from flab to utterly fabulous in a recent jewellery advertisement.

After giving birth to daughter Aaradhya last November, the actress gained post baby weight like most mothers, but was harshly criticized for not shedding it quick enough considering her celebrity status.

Eight months down the line, Aishwarya slowly but steadily shed the kilos and went back to work, looking quite similar as her former self. Her comeback post delivery was in a print advertisement of Kalyan Jewellers, of which the 38-year-old beauty queen is the brand ambassador.

Looking at the pictures, the actress appeared to have lost a significant amount of weight. However, some reports said that Aishwarya is looking quite thin like her earlier physique, suggesting that the photos may have been photo-shopped.

Also, some websites raised questions on whether the advertisement was a recent shoot or was taken before she fell pregnant. "It's quite surprising that she has got back to her lean self within a matter of two months' after she was last pictured with a fuller post-pregnancy figure," an Indian news website said.

Put aside the doubts on her weight loss, Aishwarya's recent public appearances and a leaked video of the advertisement showed that the actress has indeed lost several kilos.

 Scroll down to see pictures of Aishwarya Rai Bachchan's journey from fab to flab:  

Aishwarya Rai as the brand ambassador of Kalyan Jewellers (Facebook/Kalyan Jewellers)
Aishwarya Rai as the brand ambassador of Kalyan Jewellers (Facebook/Kalyan Jewellers)
Aishwarya Rai as the brand ambassador of Kalyan Jewellers (Facebook/Kalyan Jewellers)
Aishwarya Rai as the brand ambassador of Kalyan Jewellers (Facebook/Kalyan Jewellers)
Aishwarya Rai Bachchan with husband Abhishek and daughter Aaradhya at Mumbai Airport (Facebook)
Aishwarya Rai Bachchan with husband Abhishek and daughter Aaradhya at Mumbai Airport (Facebook)
Aishwarya Rai attended the opening of the Bulgari Hotel and Residences on Tuesday in London (Twitter)
Aishwarya Rai attended the opening of the Bulgari Hotel and Residences on Tuesday in London (Twitter)
Aishwarya Rai BachchanWalks the Red Carpet At Cannes 2012 (Facebook)
Aishwarya Rai BachchanWalks the Red Carpet At Cannes 2012 (Facebook)
Aishwarya Rai at the 65th Cannes Festival
Aishwarya Rai at the 65th Cannes Festival
Aishwarya Rai at 65th Cannes Film festival
Aishwarya Rai at 65th Cannes Film festival
Aishwarya Rai Bachchan spotted with a double chin
Aishwarya Rai Bachchan spotted with a double chin