Beyonce has laughed off "ridiculous" reports suggesting she's not really pregnant, but reveals her mum and sister are still mad about the stories.

The Irreplaceable singer revealed her baby news at the MTV Video Music Awards in August (11) and she has been dogged by rumours suggesting she's faking the baby bump ever since.

Gossips went crazy when footage from an Australian chat show hit the internet and appeared to show the singer's bump crumple like a piece of fabric as she sat down.

But Beyonce is refusing to let the comments upset her.

She says, "There's some things that a so far (fetched) that it doesn't even upset you. (But) my mother, she's like, 'Nobody's talking about my grandbaby (like that). My grandbaby's not even here yet... I don't like it!'

"I'm like, 'Calm down mom, it's OK, it's really silly.' My mom is really protective and so is my sister, but I'm cool. It's so ridiculous and over the top."