f(x)'s Amber�kept her promise to her best friend, Ailee, as she recently uploaded a video where she flaunted her slim legs in heels on Instagram.

Dancing to the beat of "Don't Touch Me," Amber surprised her followers and fans with her feminine makeover. It was also revealed that the video was uploaded to belatedly celebrate Ailee's first place win.�Ailee revealed at the showcase for her mini album back in September, that Amber had promised to wear a miniskirt and heels if Ailee were to place first on a music show.

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Despite Amber's usual tomboyish fashion and personality, the idol was seen dressed in a pretty laced miniskirt and matching black heels, revealing her feminine side. However, Amber paired the outfit with a fitted cap, retaining a bit of her tomboyish charms.

Check out the video below!

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I kno its hella late but this is for AILEE's FIRST PLACE DARE! Catch all the craziness on "Ailee&Amber's One Fine Day" on Dec 30th! MERRY CHRISTMAS! ??? ?? ?????? ??? 1? ?? ??? ??????! ?? ????? ???? "???? ??? ?? ???"? ? ? ????! 12? 30? ?? ??! ?? ?????!! #llamalife #???? #???1??? #themlegsthough @aileeonline

Un v�deo publicado por amber j. liu (@ajol_llama) el Dic 12, 2014 at 9:00 PST