Magento: Get drowpdown attribute all options

<?php
      $attribute = Mage::getModel('eav/config')->getAttribute('catalog_product', 'brand'); //"brand" is my attribute_code
      $allOptions = $attribute->getSource()->getAllOptions(true, true);
      foreach ($allOptions as $instance) {
        echo $instance['value'];
        echo $instance['label'];
      }
    ?>