It was fast and furious but oh so good, say our photogs who were inside Britney's first big comeback concert! Brit sang Toxic and just a couple other songs and the she was out ... The fans were screaming wildly for more, but she's just left the stage and it she won't be coming back on. Her performance started around 10 pm PT and wrapped up about 20 minutes later. She's already on the bus ... We're awaiting more details and photos and will bring them to you as soon as we can ...