On January 13th, Park Shin Hye tweeted about B1A4's "Oh My God","It's a song that my brother participated in the guitar session and song arrangement. The song is good. Your guitar skill has improved"

After that a photo of Park Shin Won - Park Shin Hye's brother was revealed, and it became a hot topic. His appearance is far too different from Park Shin Hye which led everyone to doubt about whether Park Shin Hye is really a natural beauty or not.

Park Shin Won then replied on the topic,"My sister showed me a comment,"I thought Park Shin Hye is a natural beauty". My sister is really a natural beauty. I'm like that because I only focus on guitar and don't care about my appearance"

Park Shin Hye's brother appeared on SBS radio "MC Mong's Living Together" back in 2008. He's a member of Tree Bicycle.