Continuity mistake: When Sonny first enters the boarded up auditorium and takes off his roller skates, his shirt buttons switch sides in some of his closeups, revealing flipped shots.
Continuity mistake: When Sonny appears on the stairs at the art studio note Richie's hair as he walks past him, then as soon as Sonny walks across the room and takes off his vest, Richie's hair is now longer and fuller. (00:08:30)
Visible crew/equipment: During the club's opening night, when Kira sings "Fool" one of the other cameras, the cameraman, and two crewmembers can be seen twice at the right side of the screen. (01:28:40)
Continuity mistake: After Simpson tosses the album to Sonny, when he looks at the album cover in the closeup we see the hands holding the album have bitten down fingernails, but there are quite a few other closeups of Sonny's hands and his fingernails don't look like that. (00:10:10)
Answer: No, just people hanging around. Kira was the only one of the sisters sent to earth.