Lady Gaga's new video for "G.U.Y." features many of the cast members of The Real Housewives of Beverly Hills. But not all of the stars from the Bravo reality show make an appearance in the clip.

Brandi Glanville and Joyce Giraud are both missing from the video. If you're wondering why, Us Weekly explains that Glanville was committed to promoting her new book, Drinking and Dating, in New York at the time of the video shoot in California last month.

As for Giraud, she just didn't want to take part in the video. An Us Weekly source says, "She was asked, but it was after the Real Housewives reunion and Joyce was over it."