as a solo artist, will.i.am has released four solo albums. his first album "lost change", was released in 2001 through atlantic records. his second album, "must b 21", was released on september 23, 2003. the track "go!" was regularly used as the theme for "nba live 2005" and "madden nfl 2005". the third album, "songs about girls", was released on september 25, 2007. he released his fourth studio album, "#willpower", in 2013.