Many fans were excited at the possibility of SISTAR's main rapper Bora collaborating with 'Unpretty Rapstar' contestants and now that collaboration is coming one step closer!

On April 16, the official collaboration teaser photo of Bora, Kisum, Lil Cham and JACE was revealed on SISTAR's official Twitter.�The caption read, "Here is SISTAR Bora X Unpretty Rapstar's Kisum, Lil Cham and JACE's collaboration photo! Please look forward to April 28!"

The four girls are looking fierce and charismatic in the black-and-white photo wearing stripes, standing next to a mysterious guy with a monkey mascot head on. It makes us wonder if there's another male male rapper to be part of their collaboration!

Starship Entertainment said, "Even though it was their first time working together, they perfectly finished the photoshoot with professional poses. The chemistry between SISTAR's Bora and the 'Unpretty Rapstar' contestants' was as if they were one team."

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It really seems like all of the 'Unpretty Rapstar' contestants have shot up to stardom after the show! Are you excited for their collaboration?