Mistaken Identity is the second studio album by Australian singer Delta Goodrem, released in Australia on 8 November 2004, a day before Goodrem's twentieth birthday, by Epic and Daylight Records. Goodrem co-wrote some of the album with Guy Chambers, who also produced the album with Richard Flack and Steve Power. Mistaken Identity debuted at number-one on the Australian Albums Chart making it her second number-one album but the sales did not match up to her previous album Innocent Eyes (2003) which sold 4.5 million copies worldwide. The album produced Goodrem two more number-one singles with "Out of the Blue" and "Almost Here", and the rest of the album's singles; "Mistaken Identity" and "A Little Too Late", became top twenty hits. The album features Goodrem's first duet, "Almost Here" (with Irish singer Brian McFadden). Content Music was one of the main comforts for Goodrem during the chemotherapy for her Hodgkin's lymphoma cancer diagnosis. Songs kept going around in her head: harmonies, melodies, lyrics, many deeper and darker than those that were on her debut album, Innocent Eyes. Goodrem states "It's a more grown up album", "My music changed because my life had changed; the whole world around me had changed. My music had to reflect that". "Extraordinary Day" is about the day (8 July 2003) when she was diagnosed with Hodgkin's lymphoma, "The Last Night On Earth" is a song about death and love, "The Analyst" tells the story of the hours of self-analysis she dealt with, "Be Strong" is an encouraging call for confidence and "Mistaken Identity" is Goodrem stating for the record where her head was at. She also stated "There are a lot of lyrics I wouldn't have used on the first album". Musically the album is more classically piano driven and ventures into pop rock and pop jazz. The single "A Little Too Late" is guitar-driven pop rock song; "Mistaken Identity" is a dark, theatrical alternative pop song; while "The Last Night On Earth" is a pop rock ballad. Goodrem states that "This time around I had time to think 'What kind of song do I want to create here?'", "I really felt the sky was the limit with this record, you could do anything in a song. I didn't feel limited at all. There were a lot more options, a lot more paths I could go down, more directions I could choose". Songwriter Guy Chambers had