Who is Anthony Key on 'American Idol'? Anthony Key is a 27-year-old DJ from Merrillville, Indiana. He also goes by the moniker 'Popstar Anthony'. He spoke about his touring days as a pop singer in the video package. "I want to be a light to the world through my performance," the Instagram bio of this pop singer and dancer reads. Anthony has released a song titled 'Key to My Heart' that is available on his Instagram feed as well as on his Youtube channel. "I am a singer, dancer, songwriter and overall a musician who aspires to become a Pop Music artist. With your help, you can make this dream come true! And I will forever have you to thank for it... yes, you! The Key To My Heart!" he writes in the bio of his channel.