When Carly and Sam are seated on the couch and Carly is examining Sam's "meat patch" Carly has a closed book on her knee - the book is suddenly open then just as suddenly closed again, then Carly opens the book.
While Carly is singing "Shakespeare", right after Sam throws away the empty platter, Carly sings "oh-oh" then closes her mouth and moves the microphone away from her mouth - but her singing voice continues in the soundtrack for a few seconds before she raises the microphone to her mouth again and starts to sing again.