Gossips and bloggers went into overdrive when the pals posted a sonogram baby image on Twitter.com, because the picture didn't actually go viral until 2 April (15), and many thought it was too late to be a practical joke.

Appearing on Thursday night's (07May15) Jimmy Kimmel Live in America, she said, "We were basically talking about how I hadn't pulled any pranks yet and he'd been getting people all day, so he's like... 'I got this'. A couple of minutes later my show is blowing up...

"But the best part was that neither one of us chose to say, 'April Fools', so April Fools... There's no baby."