Dedicated fans are having their fan abilities tested(?) with these two male K-Pop idols, who resemble each other in their childhood photos so closely that it's hard to believe they're in fact, two different people. 

Below, childhood photos of two male idols from the 5th generation are found in random order. Can you tell them apart?

SEE ALSO: BOYNEXTDOOR charts on the U.S. Billboard global charts for two consecutive weeks

Did you figure out which 2 K-Pop idols were pictured above? It's RIIZE's Wonbin and BOYNEXTDOOR's Sungho!

Now, here's the answer key to which of the above childhood photos belong to which idol:

1. Wonbin

2. Wonbin

3. Sungho

4. Sungho

5. Wonbin

6. Wonbin

7. Sungho

8. Wonbin

9. Sungho

10. Sungho

11. Wonbin

12. Sungho

13. Wonbin

14. Sungho

For many K-netizens, the trick to Wonbin and Sungho's close resemblance in their childhood photos lay in their glasses. 

In fact, older generation K-Pop fans were reminded of the popular "Doojoons" meme featuring Highlight's Doojoon, INFINITE's Hoya, B1A4's Sandeul, and EXO's Xiumin.

Fans commented, "Children's glasses are the problem kekekeke", "So funny how children growing up in different generations wear different glasses kekekeke", "I can only tell them apart by the lips", "This is way too hard lol", "I can tell them apart only because of the watermarks", and more.