Simon Cowell looked sad after hearing that Siobhan Magnus was going home on Wednesday night's American Idol, a show witness tells UsMagazine.com.
Also bummed at the news: fan favorite Crystal Bowersox, who bowed her head when the results were read, and Siobhan's sister, mom and friends, who cried through her exit song.
(Siobhan was in the bottom three alongside Michael "Big Mike" Lynche and Casey James, who all got a group hug from Ryan Seacrest during a commercial break.)
When Siobhan sang her final screaming note, Simon was clearly smiling, even though he had turned away from her.
After finishing her song, the 20-year-old Cape Cod, Mass. resident gave Lee DeWyze a full body hug and stopped to talk to judge Kara DioGuardi, who went running up from her seat to say goodbye.
In the audience: Cameron Diaz and Antonio Banderas, promoting their newest Shrek flick. Diaz spent the most time chatting with Ellen DeGeneres and Seacrest, while Banderas chilled with Randy Jackson.
"Cameron seemed in a great mood, laughing and smiling and waving at everybody," the witness says.
Wednesday night's Idol was full of performances. The Rascal Flatts rehearsed a song during a commercial break, and then spent some time chatting with Jackson. Shakira then hit the stage barefoot with Rascal Flatts.
After the show wrapped, Lady Gaga pre-taped her performance in a set so elaborate, the crew spent three hours the night before building it. She seemed to be singing live, and was definitely playing the piano live. She rehearsed a few times. It airs on the May 5 episode.
For access to all our exclusive celebrity videos and interviews – Subscribe on YouTube!