 " Womanizer " is an uptempo electropop and dance @-@ pop song with dark synths that runs through a dance oriented beat . It has been compared to previous Spears ' songs such as " Toxic " ( 2004 ) and " Ooh Ooh Baby " ( 2007 ) . It is written in the verse – pre @-@ chorus – chorus form . The track opens with its <unk> sirens . According to Ann Powers of the Los Angeles Times , Spears " quick @-@ witted " vocals are similar to the style of The Andrews Sisters . It was also noted by Daily News writer Jim Farber that Spears ' delivery has a " tone of petulance " . After the bridge , Spears sings the chorus one more time and the song ends while the beat drops and Spears sings the " you ’ re a womanizer , baby " hook . The song is set in a 12 / 8 time signature and composed in the key of C ♯ minor with 139 beats per minute . The chord progression in the song is C # m @-@ F # m @-@ E @-@ Eb @-@ D. Lyrically , the song refers to a womanizing man . It has been suggested that the lyrics address Spears ' ex @-@ husband Kevin Federline . 
