Los Angeles - The season 11 American Idol finale brought in the lowest TV audience of its 11-year history with just 21.5 million Americans tuning in to watch indie singer Phillip Phillips clinch the title, according to ratings data on Thursday.
The singing contest, once a TV industry juggernaut for Fox which attracted more than 30 million viewers for its finale in its 2006 and 2007 heyday, was the most-watched programme on US television on Wednesday night.
But audiences dropped by about 32% compared to last year's season finale, Nielsen data showed.
Fox executives said earlier this month that the audience drop-off this season had been greater than they anticipated and said that several tweaks were in the works to freshen the format for 2013.