Singer's big announcement proves huge worldwide news
The superstar singer, 29, decided to tell the world her happy news at the MTV Video Music Awards.
After her performance of Love On Top, the diva opened up her purple sequinned blazer and rubbed her growing baby bump.
And millions took to Twitter to share their delight at the announcement.
‘Last night at 10.35 ET, Beyoncé’s big MTV #VMA moment gave Twitter a record bump: 8,868 Tweets per second,’ @TwitterGlobalPR Tweeted on Monday.
BEYONCE IS PREGNANT was also a huge Trending Topic on the social networking site.
Mrs Jay-Z has more than 1.6m followers – and has never even Tweeted.