You know I'd like to go to the club, but my super Annoying Little Brother has some kind of Syndrome or something. I can't get over how whinny he is, and he's such a little snitch, he'll just tell my mom or dad. Stupid Annoying Little Brother Syndrome (A.L.B.S)
The actor/singer/celebrity that could be the little brother or sister of anyone with a little brother or sister, since this person actually was somebody's little brother or sister growing up.
If the singer/actor thought his/her boy/girl next door image was bad, he/she could have always got stuck with the America's little brother/sister image of the other actor/singer/pop star.