While planning for his solo song project with Epik High as part of the Barefoot Friends' latest challenge, he had the idea of recruiting the girl group member and 'nation's first love' to feature in his track. Unfortunately, he didn't know her phone number, but that didn't put a stop to his plans.

After fruitlessly calling JYP Entertainment's public line, he finally contacted comedian Lee Soo Geun, hoping that he would have Suzy's number. As it turns out, he did have the number -- her mother's number, that is.

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After a brief and extremely awkward conversation with Suzy's mother, Eun Ji Won successfully earned her phone number, at long last!

Unfortunately, despite Eun Ji Won's tenacity, Suzy wasn't too keen on the idea when she finally picked up the phone after she heard that the concert was next week. "I think I'll have to check my schedule..." she trailed off, prompting Eun Ji Won to reply, "We'll just conclude that you're not coming".

Check out the full episode below!