It's official: Kim Kardashian, Taylor Swift and more tops are crazy for Madonna.

The OG Queen of Pop began her Madame X tour in September and since then, many stars have attended her shows. She recently began two-week a concert residency at Los Angeles' Wiltern Theatre. Kim and sister Kourtney Kardashian attended a show there on Wednesday. At one point, Madonna stepped offstage and sat next to Kim. She posted on her Instagram Story a video of their mid-show interaction.