Backstreet Boys singer Brian Littrell might barely hold it collectively as he stood exterior the doorways throughout his 22-year-old son Baylee’s audition for “American Idol” on Sunday evening’s present.

Brian obtained visibly emotional as he advised cameras how “proud” he’s of his son in the course of the Season 23 premiere of the singing competitors, explaining … “He is clearly grown up within the enterprise and I believe he is lower out for it.”

The proud papa was additionally thrilled to affix his son in his audition at choose Luke Bryan‘s request. They seamlessly harmonized to the refrain of Baylee’s authentic track “Ready on Myself to Die” … and Brian choked up once more as Baylee was praised by all three judges — together with Lionel Richie and Carrie Underwood.

He exclaimed, “I am crying!” earlier than Baylee appeared to tear up as he thanked the judges.

Nation crooner Carrie advised Baylee he can go far within the comp … so followers must sit again, watch and — after all — vote when it comes time for that part of the present.

Baylee sang his father’s praises in the course of the audition course of, additionally … saying he thinks Brian’s profession “is among the most extraordinary in music historical past.”

He additionally recalled opening up for the Backstreet Boys as a child, saying …”I simply had my two little songs and I got here off stage and when the fellows went on, the screams and the lights went down. I used to be simply mesmerized.”