...
my $cds = table caption ('CD Collection for user ' . $username),
Tr (th ([qw(Remove? Artist Album CD_vote ArtistCD_vote)])),
map { Tr (
td ([$r_user_collection->{$_}{'cd_artist'}]),
td ([$r_user_collection->{$_}{'cd_title'}]),
),
} keys %{ $r_user_collection };
$MAIN_CONTENT .= "
" . $cds . "
";
...