Katy Perry has broken her silence on helping to deliver her sister's baby.

The singer tweeted recently that she had assisted in the birth of a woman's child in a living room.

She has now told Australia's Sunrise that it was in fact her sister Angela Hudson that was giving birth.

Perry said that it was an "incredible" experience and that she filmed it with her phone. She said:

'My sister had a baby in her living room - very naturally, not one Advil. I was there kind of being an assistant doula and saw everything. We had dinner first, obviously before I saw it all. No, it was just there and it was an incredible experience.

"I was kind of like Martin Scorsese with my iPhone - I have the whole thing. It was like a water birth, the whole thing we're like 'The child is swimming through the water'. It's crazy."

Watch Katy Perry in Australia below: