This week's airing of 'Produce 101' surprised the viewers with an unexpected result in rankings. 

On the episode that aired February 26, sub vocalist Park Shi Yeon and main vocalist Kim Tae Ha were neck and neck. 

SEE ALSO: Lee Chan Won wins #1 + Performances from May 4th 'Show! Music Core'!

The two contestants, who were in the same team alongside Lee Hae In, Jung Hae Rim, Han Hye Ri, and more, performed G-Friend's "Me Gustas Tu." 

In an unexpected turn of events, Park Shi Yeon placed first despite being the sub vocalist, beating Kim Tae Ha, the main vocalist, who placed fourth. 

What a twist, huh? 

Congratulations to Park Shi Yeon!