On Sept. 18, Lady Gaga performed in front of hundreds in an Amsterdam concert but photos taken at the event show the singer with a much fuller figure than usual, as she continues to sport her usual risque outfits. 

Click here for images and see for yourself. 

The singer received backlash in 2008 where she first rose to fame with a much tinnier frame. Rumors aside though, there is a noticable difference in appearance between Gaga in these recent photos, courtesy of ABC, and, say, her almost naked and much thinner body in her past music videos, such as "Bad Romance."

The Sun reported that many experts have surfaced stating that perhaps Gaga's weight gain is a result of her love for alcohol. She has admitted in the past to prefer a  "drunk diet" over food. 

"I am on the drunk diet. I like to drink whiskey and stuff while I am working," Gaga admitted in 2011. "But the deal is I've got to work out every day, and I work out hungover if I am hungover."

See more photos of Gaga's fuller figure here.

A nutritionist told Radar Online that Gaga appears to have gained nearly 30 pounds, however, according to The Sun, Kelly Osbourne has another theory about Gaga's body change.

"I think she is pregnant because she has been covering up this part of her body recently and I have been noticing that a lot," she said. "And her style has changed and you can't bleach your hair blonde when you are pregnant."

That is one theory, but what do you think?