-Harry using his robot app because his doctor told him he can only sing or speak, not both.
-The boys & Grimmy call Harrys mom "hot"
-Nobody has Liam's number because he "changes it a lot" lol
-The boys do impressions of each other to see how much they have changed over the years
- A fan asked them if they were at Hogwarts what would their house be. Liam shows his true geek & admits that he took a Harry Potter test online like this with his friend. He got Hufflepuff (Edit:the friend, not Liam). He also bought the Harry Potter car & has it in his yard. lol
-Harry's thigh tattoo is a tiger.
There's an extended interview at the source: http://www.bbc.co.uk/programmes/articles/4HW4fJg2tNXK7dXtjDTWM8Z/get-to-know-one-direction-as-they-answer-your-questions-before-their-first-ever-live-lounge