Liam Payne's fans know him very well. But how well does he know trivia about himself? We put him to the test when he faced off against one of his biggest fans in a game of trivia ... Liam trivia to be exact. 

Kaelin, from Long Island, New York, submitted a really touching 30-second video explaining just how much she loves Liam. "He's just helped me through the toughest times of my life without him even knowing it," she said. "Meeting him is the biggest dream I have."

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Well ... dream come true for Kaelin! Because iHeartRadio selected her to meet Liam, and compete against him in trivia about himself. Kaelin came to the iHearRadio studios in New York City with her sister, younger brother, and mom. 

Kaelin told us that she and her sister have been One Direction fans from the beginning of their career, and explained that her parents have taken them to their concerts in different cities like Boston and Baltimore, even though they live in New York. Their mom even sat through a rain storm outside with them to see One Direction on Good Morning America one day. Mom goals. 

So who won Liam Payne Trivia? You may just be surprised! Watch the video above to find out.

Liam Payne

Photos: Rachel Kaplan