'K-Pop Star' season 1 and 2 finalists reunited to sing "One Dream" for 'K-Pop Star 3'!

15&'s Park Ji Min, Lee Hi, Baek Ah Yeon, Lee Seung Hoon, Park Jae Hyung, 2000 Won, Bang Ye Dam, Shin Ji Hoon, Andrew Choi, YouU, Yoo Hyun Sang, McKay Kim, and Choi Ye Geun put their own hearty spin on BoA's "One Dream" which was previously sung by the 'K-Pop Star' judge to cheer them on.

Labelmates Lee Hi and Akdong Musician shared, "We hope that we can be of small encouragement to the 'K-Pop Star 3' contestants with this title track and special video." Bang Ye Dam also added, "If it wasn't for 'K-Pop Star 2', I would've been just a normal school student so it's amazing to take part in the title track for 'K-Pop Star 3'."

Spot all of the beloved 'K-Pop Star' alumni in the "One Dream" MV above!�

SEE ALSO: 'K-Pop Star 3' is looking for talented individuals in Los Angeles, Atlanta, and Chicago!