More Than One Post Type

I have success with one post type using the below code:

add_filter( 'lfc_supported_post_types', 'mycustom_add_lfc_cpt_support' );

function mycustom_add_lfc_cpt_support( $post_types ) {
    // Here mycpt is your custom post type name.
    $post_types[] = 'lyrics';

    return $post_types;
}

But how can I use more than one post type? I tried for three post type then I have no luck with these codes:

add_filter( 'lfc_supported_post_types', 'mycustom_add_lfc_cpt_support' );

function mycustom_add_lfc_cpt_support( $post_types ) {
    // Here mycpt is your custom post type name.
    $post_types[] = 'lyrics';
    $post_types[] = 'artist';
    $post_types[] = 'album';

    return $post_types;
}

Please help me. Thanks