Zoe Sugg has put her boyfriend in the ultimate challenge- does he know her better than her best friend?

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On Monday, the beauty tutorial sensation uploaded a new YouTube video that shows her sitting with her boyfriend Alfie Deyes and her best friend Louise. Sugg puts these two in a difficult game of how well they know her and who tops who.

The first question is what they would cook for Sugg as an ultimate pick-me-up. Louise jumps for that answer and says she would prepare a special pizza with a side of mashed potatoes for her friend. As for Deyes, he would make pretty much the same thing although he made his words sound a little more intricate.

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That's a tough call for Sugg so she lets them both have the first point.

When the second question comes up, the two people who are closest to the British vlogger glare at each other as if they're about to face a wild match. When Sugg asks what they would order her for a good dinner, it was the best friend who gains that point since she mentioned Sprite and not Minute Maid lemonade.

Things get more intriguing when the 24-year-old asks her two favorite people how much of her book they've read- unfortunately, neither of them are too confident on how to answer that.

Find out what happens in the video below.

Tags: Zoe Sugg Alfie Deyes