The song Erotica by Madonna was released in 1992. It can be found on a CD, or one can download the song from a site such as iTunes for a fee. Also, it can be found on Amazon.
True Blue - Luna Sea song - was created on 1994-09-21.
How High - Madonna song - was created in 2005.
Amazing - Madonna song - was created in 2000.
Jump - Madonna song - was created in 2005.
according to Wikipedia: True Blue by John Williamson
Madonna never sang that song, Sandra did, in 1986.
Hey You - Madonna song - was created on 2007-05-16.
Bad Girl - Madonna song - was created in 1992.
Music - Madonna song - was created on 2000-08-21.
Rain - Madonna song - was created on 1991-12-06.
Celebration - Madonna song - was created on 2009-07-31.