Los Angeles, July 18 (IANS): Reality TV star Kim Kardashian West says hiding her second pregnancy at the 2015 Met Gala in May was "the most difficult" thing she has done all year because she was nauseous walking the red carpet.

The "Keeping Up with the Kardashians" star, who is expecting a baby boy with husband Kanye West in December, says walking the red carpet in a sheer white dress at the prestigious event in New York City was very challenging.

"The most difficult thing of this year was going to the Met Gala because I was a little less than two months pregnant and had nausea. I tried to eat very healthy the week before -- chicken soup and salad. But my dress was transparent so I tried to suck in my stomach on the red carpet," she told Vogue Espana magazine, reports femalefirst.co.uk.

The reality TV star also credits the "Stronger" hitmaker for helping her to keep the news a secret until they were ready to announce it on her family's reality TV show later.

She said: "My husband and I came up with a way that I could only take photos from the front while I was holding my breath and when I turned I would let out my breath and stay very close to Kanye to hide."

Together, Kanye and Kim have a daughter named North West.