Blue Peters Radzi meets Frozens Elsa and Anna before facing a tough ice skating challenge in front of a huge audience! Watch fans sing Frozens Let It Go on .\r<br>\r<br>\r<br>\r<br>Some highlights from Blue Peter - new episodes every Thursday on CBBC! For more Blue Peter clips, visit the website at bbc.co.uk/cbbc/shows/blue-peter.\r<br>\r<br>\r<br>\r<br>Blue Peters Lindsey took part in the incredibly tough London Marathon – here are all the highlights! For more fun, CBBC games and great makes visit .
