On February 7, Heize posted a promo clip via Instagram with the caption, "Please check out the exclusive colors I picked out myself... #MAC X #HEIZE"

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The short video featured the singer presenting a groovy vibe rocking a total of 15 bold shades of pink, peach, purple, and more by MAC lipstick.

Meanwhile, Heize participated in writing the lyrics for Dynamic Duo's comeback track "Bongjeseon" (Sewing Line) featuring Suran.

?? ?? ?? ??? ????? ?? ???????.. #MAC X #HEIZE @voguekorea

A post shared by ??? .. ?? (@heizeheize) on Feb 6, 2018 at 11:21pm PST

???? ?? ??????, ? ?? ??? ?????! ?? ??? ??? ???? ??? ?? ????? ??? ??? ??? ??? ???? ???! ??? ?????? ??? ??? '??? ??'? ??? ? ?? ?? ??????, ??? ? ???? - #15Shades_of_Heize #? #??? #????? #MacxHeize #???????? #2?8??? @heizeheize

A post shared by Vogue Korea (@voguekorea) on Feb 7, 2018 at 2:00am PST