Adam Lambert to Return to 'American Idol' Next Week for Final Performance

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Adam Lambert performs at House of Blues Boston on Feb. 24, 2016.

American Idol alum Adam Lambert will return to the show for next Thursday night's program.

The Season 8 alum is taking time out from his Original High tour for what is being billed  as "a very special final performance."

The remaining six American Idol contestants -- La'Porsha Renae, Trent Harmon, Dalton Rapattoni, Tristan McIntosh, Sonika Vaid, and MacKenzie Bourg -- will sing songs picked by America for a theme week billed as "America's Choice".

Also, only one contestant will be sent home next week. The past two weeks have been double eliminations.

American Idol will air 8 p.m. ET March 17 on Fox.