Is Beyoncé pregnant with baby No.2?

The singer Beyoncé is reportedly pregnant, claims a U.S. newspaper.

Pictures of the singer on stage in London appear to show the 31-year-old with an uncharacteristically rounded tummy. 

And another report claims the singer's much derided Met Gala look was designed to conceal her growing pregnancy figure.

The 'Grown Woman' singer - who welcomed her first child, daughter Blue Ivy Carter, into the world in January 2012 - is said to be expecting again with her rapper husband Jay-Z.

See the video below

Broody: Beyoncé pulled a toddler up on stage last week and appears to have a rounded stomach in her tight-fitting catsuit 

Pregnant? Beyonce invites toddler on stage mid-song

The New York Post newspaper claims 'multiple sources' told them Beyoncé, 31, is pregnant following her attendance at the star-studded Met Ball last week, where the star's rumoured pregnancy was the talk of the night.

The pop superstar is said to have 'carefully' hidden her baby bump in a high-waisted Givenchy gown, but according to the report, multiple photos have surfaced of Beyoncé sporting a growing stomach on her 65-date 'Mrs. Carter Show' world tour, which touched down in Dublin, Ireland, on Sunday.

Blog Media Takeout ran photos showing the singer's rounded tummy. 

Beyoncé's Met Gala look was reportedly designed to conceal her growing tummy

The 'Girls (Run the World)' hitmaker's spokesperson couldn't be reached for comment by the newspaper, but Beyoncé and Jay-Z - real name Shawn Carter - remained tight-lipped about her first pregnancy until sensationally announcing it live at the MTV Video Music Awards in August 2011.

Beyoncé recently admitted she would love to give her 18-month-old daughter a sibling, because she enjoyed such a close relationship with her younger sister Solange Knowles, 26, when they were growing up.

She said: 'I would like more children. I think my daughter needs some company. I definitely love being a big sister.'

How hot are you? Beyoncé treated her crew to a £750 chicken dinner from Portuguese food chain Nandos

Dad problems: The singer's father reportedly owes the IRS $1.2 million in tax from the years 2010-2011

When pressed on when she may have another child, she added: 'At some point, when it's supposed to happen.'

In other family matters, Beyoncé's father Matthew Knowles has reportedly been landed with an approximately $1.2 million tax bill.

TMZ say the IRS claim he still owes taxes from 2010-2011, the years in which Matthew was still managing his daughter as well as his own record label.

The government has allegedly filed a large lien against Knowles, claiming he needs to pay $485,575.95 from 2010 and $728,004.89 from 2011, which comes to a total of $1,213,580.84.

Baby daddy: Jay-Z and Beyoncé welcomed their daughter into the world in January 2012