 " Let 's Get Crazy " is a pop song by American singer – songwriter and actress Miley Cyrus , performing as Hannah Montana – the alter ego of Miley Stewart – a character she played on the Disney Channel television series Hannah Montana . It was released to Radio Disney on January 19 , 2009 as promotion for Hannah Montana : The Movie and its soundtrack . The song is also included on the Hannah Montana 3 soundtrack . A karaoke version is available in Disney 's Karaoke Series : Hannah Montana 3 . The song is musically pop rock and synthpop based . Lyrically , the track speaks about having fun and cutting loose . 
