Rumors about Beyoncé expecting a second child once again fired up when the singer posted a cryptic photo on her Instagram account.

On Sunday, the "Love on Top" hitmaker shared a picture of herself on the photo sharing website. The picture shows Beyoncé lying on a beach buried in the sand, with what appears to be a huge baby bump on her belly. No caption was provided for the image.

According to a report from E! Online, the 33-year-old singer, her husband Jay Z, 45, and their 3-year-old daughter Blue Ivy Carter, recently went on a vacation in Cambodia and Thailand. The couple dated for six years before marrying in April 2008. Beyoncé announced her first pregnancy onstage at the MTV VMAs in August 2011.

Back in 2013, the singer said, in an interview with ABC News, that she would like to have more children and that Blue Ivy "needs some company," E! Online noted. It was also in 2013 when rumors about a second pregnancy made headlines after fan photos surfaced on the Internet, with Beyoncé appearing to have a small baby bump while performing during the "Mrs. Carter Show World Tour," Billboard reported.

The pop star also stated, in an interview with Anderson Cooper, that motherhood gives her purpose. "I realized why I was born and, more than anything, all of the things I want to pass onto my child and the best way of doing that is not by preaching or telling her but showing her by example," Beyoncé said, as quoted by E! Online.

Jay Z, on the other hand, also fanned rumors last year during their "On the Run" tour in Paris, France. According to TMZ, the musician changed a lyric in the Hova song titled "Beach is Better," singing "pregnant with another one" instead of "I replace it with another one." Then again, this could just be a promotional move for the concert tour.

Another report, this time from Air Herald, also claimed that Beyoncé could be pregnant with baby no. 2, and that she's doing her best to obscure her baby bump from the sharp eye of the public.

"The first reports of Beyoncé's pregnancy started around a month ago, when she appeared to be covering up a baby bump at a Nets basketball game," Air Herald noted. More members of the media covered the event because of Prince William and Kate Middleton's presence, so it's no surprise that multiple photos of Beyoncé and Jay Z were also taken. The news outlet also reported that Beyoncé appeared to be eating a lot of food during the basketball game.

No official word about the rumored pregnancy has been confirmed by the couple's camp and representatives yet.