The Naked Brothers Band was a band formed in 2001, when Nat was 5, Thomas David and Josh were 5 and Alex was 2. Nat likes Rosalina so he put her in the band. She could play 10 instruments so she played the bass. They had a movie in 2005, which led to a TV series in 2007, running till 2009. We don't know if they split up or because Nat was going through puberty, which means he can't sing high notes now. They took Cole and Josh out of the band, and added Qaasim. Heading towards the end of the series, they added Kristina.