Kendall and Kylie Jenner recently released a line of limited-edition t-shirts on their online shop … with their faces and initials superimposed over rap and rock royalty, including the Doors, Ozzy Osbourne, Tupac Shakur, Notorious B.I.G, and more.

As you can imagine, artists, or the estates thereof, found the shirts to be insensitive—the Jenner sisters' initials appear across Tupac’s body, and Kendall Jenner’s face is superimposed overtop Ozzy Osbourne.

In response, Sharon Osbourne took to Twitter to tell the girls to stick to lipgloss:

Girls, you haven’t earned the right to put your face with musical icons. Stick to what you know…lip gloss. pic.twitter.com/BhmuUVrDBn

— Sharon Osbourne (@MrsSOsbourne) June 29, 2017

The Doors, Rolling Stone reports, have sent a cease-and-desist letter to the Jenner sisters, claiming their image was used without consent. According to TMZ, Voletta Wallace (mother of the Notorious B.I.G.), who called the shirts disrespectful, may be following suit.