Blue Peter invade Newsround for Go Pyjamas!

Last updated at 12:29
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Watch Helen and Barney invade Joe's bulletin!

Joe got a big surprise when Blue Peter's Helen and Barney invaded Newsround HQ... dressed in their PJs!

No - they hadn't mistaken it for the BP studio, but they wanted to tell people about Go Pyjamas! and even brought along a onesie so Joe could join in too.

Through the Go Pyjamas! appeal Blue Peter are turning the UK into a giant pyjama party for Children in Need and want you to get sponsored to wear your PJs somewhere unexpected.

This could be at school, work, Scouts, football, a party, on a rollercoaster… anywhere!

And there'll a big grand finale appeal show on Thursday 15 November, the night before Children in Need.

Head to the Blue Peter and Children in Need websites for sponsorship forms and tell them how you're going to go pyjamas!