Rising star . . . falling star

Kent Kellerman, soap opera star, is coming to town. One whoe episode of his show is being filmed downtown and Jessica and Lila have passes to get on the set. There's only onw small problem. The filming is to take place during school hours. They'd only have to skip one little class . . .
Now both girls must face up to their punishment. For Jessica, that means no extracurricular activities, no Booster club, and worst of all, no playing in the basketball championship playoffs. Without Jessica, the team is sure to lose and she'll become Sweet Valley's most unpopular girl. That is, unless her twin sister, Elizabeth, agrees to save the day - and the game!

Once they made their way through the crowd, the three girls started to run. They didn't have a moment to lose. Elizabeth was going so fast that she nearly tripped. When she steadied herself, she found herself looking straight into a familiar face. It was the principal's secretary, Mrs. Knight, staring right at her!
"Oh, no. Do you see who I see?" Lila said, groaning.
Jessica's heart sank when she caught sight of Mrs. Knight through the crowd. "She's going to go right to Mr. Clark. We're in for it now."

What's the matter with Sarah Thomas? Left Behind