Kylie Jenner has been keeping a low profile on social media since the tragic events at Travis Scott's Astroworld Festival, which claimed the lives of ten guests.MORE: Kylie Jenner breaks silence in emotional statement following Astroworld tragedyBut on Wednesday, the Lip Kits founder took to Instagram to share a personal milestone with her fans concerning her beauty brand.The pregnant star shared an image posted by Kylie Cosmetics which marked their sixth anniversary.VIDEO: Kylie Jenner