Create Table:
CREATE TABLE `adwords3_tier_brands` (
  `tier_brand_id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `site_campaign_type_setting_id` smallint(4) unsigned NOT NULL,
  `tier_number` tinyint(2) unsigned NOT NULL,
  `base_multiplier` decimal(3,2) unsigned NOT NULL DEFAULT '4.00',
  `status` enum('initial','regress','repeat','graduate') NOT NULL DEFAULT 'repeat',
  `last_updated` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`tier_brand_id`),
  UNIQUE KEY `unique_key` (`site_campaign_type_setting_id`),
  KEY `site_campaign_type_setting_id` (`site_campaign_type_setting_id`),
  CONSTRAINT `a3tb_ibfk_1` FOREIGN KEY (`site_campaign_type_setting_id`) REFERENCES `adwords3_site_campaign_type_settings` (`site_campaign_type_setting_id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=200 DEFAULT CHARSET=utf8;

Query:
INSERT INTO adwords3_tier_brands
	(site_campaign_type_setting_id, tier_number, base_multiplier)
	VALUES(?,?,?)
	ON DUPLICATE KEY UPDATE
	tier_brand_id = LAST_INSERT_ID(tier_brand_id)
	, tier_number = ?
	, base_multiplier = ?;

Function Call:
try {
			$result = $this -> ExecuteQuery('query'
			, self::SAVEADJUSTTIERQUERY
			, array ( $this -> _site_campaign_type_setting_id
			, $this -> _Tier
			, $Tiers['BM']
			, $this -> _Tier
			, $Tiers['BM']  ) );

			echo "\nWTF: Tier Brand ID: ".$this -> _db -> lastInsertId()."\n";

Function Called:
private function ExecuteQuery($queryType, $query, $variables)
	{
		echo $this ->_cron_log -> AddDebugMessage("Begin ".__CLASS__."::".__FUNCTION__);

		$results = null;
		echo $this ->_cron_log -> AddDebugMessage("Query Type: ".$queryType);
		echo $this ->_cron_log -> AddDebugMessage("Query: ".$query);
		echo $this ->_cron_log -> AddDebugMessage("Variables: ".print_r($variables, true));

		try {
			switch($queryType)
			{
				case 'col':
					$results = $this -> _db -> fetchCol ( $query, $variables );
					break;
				case 'query':
					$this -> _db -> query ( $query, $variables );
					$results = $this -> _db -> lastInsertId();
					break;
				case 'row':
					$results = $this -> _db -> fetchRow ( $query, $variables );
					break;
				case 'all':
					$results = $this -> _db -> fetchAll ( $query, $variables );
					break;
				default:
					throw new Exception("Undefined query type in ".__CLASS__."::".__FUNCTION__);
			}
		}
		catch(Exception $ex)
		{
			echo $this -> _cron_log-> AddError("\nFailed ".__CLASS__."::".__FUNCTION__." for Site ID: {$this -> _site_id} with error: $ex");
			return false;
		}
		echo $this ->_cron_log -> AddDebugMessage("End ".__CLASS__."::".__FUNCTION__);
		return $results;
	}