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The Capital Late Show With Marvin Humes 10pm - 1am
When Justin sang "baby baby baby", he was almost right turns out his biggest fan is just 3 years old.
Little Cody is such a big Justin Bieber fan, she loves him so much that it makes her sad ...really sad, she just wants to see him every day.
Luckily her mum caught it all on camera and shared it with the world, you've got to watch to the end, we love the bit where Cody think Justin might be on the phone for her.
Take a look at Cody's video and let us know what you think below...