I need a little help with .htaccess file I have songs, singers and albums links I want to rewrite.

I all ready rewrote the links and they are like this: the links for the songs is like this:

/song/song_name

for singers:

/singer_name

for albums:

/album_name

From my .htaccess file:

RewriteEngine on
RewriteRule ^singer/([^/\.]+)/?$ /core/controller.php?singer=$1 [L]
RewriteRule ^song/([^/\.]+)/?$ /core/controller.php?song=$1 [L]
RewriteRule ^album/([^/\.]+)/?$ /core/controller.php?album=$1 [L]

I need the links for the songs, singers and albums to be like this:

for songs /singer_name/song_name

for singers /singer_name

for albums /singer_name/album_name

can anyone help me with this please.