Pop superstar Beyonce has cast doubt on rumours she is set to become a mother for a second time by posing with a glass of Champagne at an end of tour party.

The singer and her husband Jay Z were rumoured to be expecting a sibling for their daughter Blue Ivy after the rapper reportedly changed the lyrics in one of his songs during a live show in France on Friday (12Sep14) to suggest the star is pregnant.

The Big Pimpin' hitmaker is said to have rapped in his song Beach Is Better, "Pregnant with another one," in place of, "I replace it with another one."

However, the pair appears to have dismissed the pregnancy rumours by posing with glasses of Champagne at an end of tour party just a day after the reported lyric change.

The snap, which shows Jay Z and Beyonce laughing and holding up their glasses of booze, was posted on the rapper's Life + Times Twitter.com page.