Avril Lavigne also appeared on the show for Kim's two-part wedding extravaganza.
The singer had started dated Brody Jenner, Kim's stepbrother, prior to the wedding.
Avril Lavigne has many tattoos, though most of them are small. She told Inked Magazine: "Everything is always spur-of-the-moment.
All of my tattoos I decide that second and do it," but also added that she would like a larger tattoo at some point in the future with proper planning.
Back in December of 2011, Tyga made his first appearance on the show as none other than the musical guest for Kendall's Sweet 16. Former Cheetah Girl Adrienne Bailon first appeared on the show in a 2008 episode, about a year after she and Rob had started dating.
She was only in a handful of episodes, including the one in which Khloe and Lamar got married and Rob tried to rekindle his relationship with her.
We first heard about Avril Lavigne and Brody Jenner hooking up in February of 2010.