The 6-membered boy band Boyfriend recently revealed this surprise: In 300 copies of their newest single album titled "I'll Be There," they have hidden one-of-a-kind limited edition polaroids of themselves. 

The boys carried cameras around for 200 days, and took photographs of themselves during their daily activities, including the filming of their most recent music video. 

Boyfriend tweeted on December 11: "What's that you have on the back of your album? It's the secret gift we've prepared for you. We've placed a one-of-a-kind polaroid in our 3rd single album. Among the photographs, you'll find some of us taken during the filming of our music video, on and off set." In addition to text, they tweeted an image of the group standing in front of a wall full of the polaroids (see above). 

The single "I'll Be There" has since ranked high on the online music charts, showing how they have captured the hearts of many young girls.