Saturday Mash-Up

This week Extreme Mountain Challenge, Deadly 60 and former Strictly Come Dancing star Steve Backshall will be in the studio, discussing his animal adventures, answering questions from viewers and taking part in some hare-brained games. Steve will take on the fearsome Push Off challenge- but will he avoid a mash-up gunging? Throughout the morning viewers can get involved in the Make Me Viral challenge - who will get the nation talking with their videos? Can you get in touch to guess 'how many things are in the thing?' To top it all there will be cartoon fun with Danger Mouse and a brand new episode of CBBC favourite The Next Step. So stick with Saturday Mash-Up! – the show where anything can happen….except cooking!

Featuring cartoon action from Danger Mouse and Ooglies, plus music from JP Cooper.

Jonny, Yasmin and Hacker return for another live morning of Saturday Mash-Up chaos!

Featuring Jim Chapman, New Hope Club and Radio 1's Chris Stark. Meanwhile, Hacker gets his dancing shoes on when he visits the set of Strictly: It Takes Two and meets Zoe Ball. There's the worldwide premiere of a brand new edition of The Next Step, and cartoon action from Danger Mouse, Ooglies and Zig and Zag. More stars take on the tower of toilet roll in Push Off, and there's another round of How Many Things in the Thing?

This week The Vamps and The Next Step stars Trevor and Isaac (aka James and Eldon) drop in. Camilla Cabello answers questions in Stars Behind Bars and Hacker hangs out with JoJo Siwa. There's another brand new edition of The Next Step, plus cartoon action from Danger Mouse, Ooglies and Zig and Zag. And five more callers get the chance to guess How Many Things Are In The Thing?

This week Pixie Lott, Matt Edmondson and The Next Step stars Shelby Bain and Isaiah Peck (aka Amy and Henry) are in the studio. Plus Jonny hangs out with a host of vlogging stars. Plus there's another brand new edition of The Next Step and cartoon action from Danger Mouse, Ooglies and Zig and Zag. And can any of this week's celebrities top the leaderboard when they take on the Push Off challenge?

Lisa and Lena, Freddie Fox, Dynamo and HRVY join Jonny and Yasmin.

Yasmin and Jonny host another live show, with guests DanTDM and Max & Harvey.

Yasmin and Jonny host another live show, with guests from The Pets Factor and WWE.

Yasmin, Jonny and Hacker are back for more live entertainment, with a line-up including Matt Terry, Chris and Xand from Operation Ouch and Lauren Layfield from The Dengineers.

Yasmin, Jonny and Hacker get into the festive mood. This week's guests include Tom Fletcher and Lindsey Russell.

Yasmin, Jonny and Hacker welcome a host of stars into the studio for their live Christmas party. Plus one celebrity is crowned the Push Off Champion for 2017! Plus some of CBBC's biggest shows, Danger Mouse, Dennis and Gnasher Unleashed and brand new Odd Squad. And there's more Things in the Thing and a look at some of the best bits from the series.