Are Beyonce and Jay Z expecting a baby?

Beyonce and Jay Z perform together on the opening night of their On The Run Tour at Sun Life Stadium in Miami, Florida. Photo/AP

Rumours have sparked that the couple are expecting their second child after Jay Z changed some of his song lyrics.

Numerous news outlets are reporting that Jay Z hinted that his wife was pregnant during 'Beach Is Better' whilst the couple performed their 'On The Run' tour in Paris.

The 32-year-old rapper reportedly changed the lyrics to say: "Cause she's pregnant with another one."

The pair - who married in 2008 - already have two-year-old Blue Ivy together.

Rumours that Beyoncé is pregnant have been circulating for the last few weeks.

A source recently told the US OK! magazine: "For the last month, Jay has been fiercely protective of her, 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. 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 Beyoncé eats should be organic."

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

- BANG! Showbiz