Mad Clown and SISTAR's Hyorin�got into the spirit of April Fools' Day in the studio with their playful poses, suggesting that the two have gotten close while collaborating together.

SEE ALSO: Mad Clown releases MV teaser for 'Without You' featuring Hyorin

Starship Entertainment tweeted on April 2, "Two more days until Mad Clown's comeback! On the set of their recording for their new title track 'Without You', SISTAR's Hyorin who took part in the featuring and Mad Clown, their playful poses! You're looking forward to it, right? ^^ Please wait a little longer~!"

Stay tuned for the fusion of Mad Clown's distinctive rapping style and Hyorin's husky voice when his second mini-album 'Ferocity' drops on the 4th!