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Beyonce smiles at her daughter Ivy Blue, held by Jay-Z, as she accepts the Video Vanguard Award on stage during the 2014 MTV Video Music AwardsReuters

Jay Z has given his strongest hint yet that he and wife Beyonce are expecting a second child

The rapper is said to have changed the lyrics to a song during the first gig of the couple's On The Run European Tour.

During their rendition of the track Beach Is Better, he made the surprise announcement singing the words Radar reports.

There was no comment of any response or reaction from Beyonce.

Fuelling speculation of a pregnancy, a source claimed that the rapper had been "fiercely protective of Beyonce just like he was when she was expecting Blue Ivy."

"He's been doing everything he can to ensure that Bey is in a stress-free bubble," said the source.

"He's informed their entire entourage that they need to use relaxed voices, mellow lighting and listen to only soft music, and he's said that all of the food Beyonce eats should be organic.

"He's really doing his best to make sure that she's as comfortable and healthy as possible."'

The singer was also spotted rubbing her stomach and appeared to be showing the first signs of a baby bump, while celebating her birthday in Italy.

If the pregnancy rumours are true, it puts paid to the speculation that the marriage is on the rocks and the couple are headed for a divorce.

The reports that all is not well in the Carter household came following the infamous lift attack by Beyonce's sister Solange, after Jay-Z was reported to have been flirting with a fashion designer at the Met Ball.

Back in August, UsWeekly reported that the Carters would split soon after their Paris concert dates and planned to end things amicably.

The couple put on a public display of affection last week on Beyonce's birthday - September 6.

Beyonce and Jay Z have been married for six years and have one daughter together, two-year-old Blue Ivy, who was born in January 2012.