We search for the American Idol alums that you didn't know also started on Broadway, from Adam Lambert to Katharine McPhee.

For some of the photos, Clay and Parker posed with David Foster, who composed the music for the Broadway musical. Foster's ...

The “American Idol” alum and the teenager, whose mother is David Foster’s sister Jaymes Foster, appeared on “Celebrity Family ...

Clay Aiken brought a special guest to the opening night of the Broadway musical BOOP!: His son Parker, 16. Find out more about the American Idol alum's family night out.

American Idol' alum Clay Aiken made a rare public appearance with his 16-year-old son Parker at the opening of 'BOOP! The Musical' on Broadway in New York City on April 5. The pair both dressed up for ...

Bruce Glikas/WireImage Clay Aiken and ... to each other. Aiken wore a midnight blue turtleneck sweater, beige tweed trousers and a burnt orange jacket with white pinstripes. Parker, meanwhile ...

Although Clay Aiken didn’t achieve major mainstream success after his time on American Idol in 2003, he’s still one of the ...

Clay Aiken took son Parker, 16, to see “Boop!” on Sunday. Bruce Glikas/WireImage Clay Aiken took his boy to see “Boop!” The “American Idol” alum and his 16-year-old son, Parker ...

Clay Aiken’s lookalike 16-year-old son, Parker, is all grown up and stepping out with his famous dad for a rare public family outing. The American Idol alum, 46, brought his son to the opening ...