She shared a host of serious photos on her Instagram account Thursday night.
The reality personality, 42, looked stern in a little black dress with thin straps as she sat on a chair for the photo gallery.
Kourtney, posed in her room in a stylish mini dress, which she paired with a pair of thick bicycle boots, in line with her new rocker image.
The mother of three, who is in a relationship with Blink 182 star Travis Baker, added a touch of sparkle to her outfit with a single necklace.
Her hair was cut short and fell towards her shoulders as she posed for the group of hilarious photos.
In some images, Kourtney knelt on the cream and plush carpet as she shared kisses for the camera.