Clay Aiken and Ruben Studdard give American Idol fans a blast ... Reunion Show — a night of sketch comedy and holiday songs that’s now open at New York City’s Imperial Theatre.

Ruben Studdard: Not at all ... Just stand still and rock from side to side." Like the first song, I think we just stood there and did this kind of thing. [ Mimes swaying from side to side.

"It was important for me as a young artist to remain in Birmingham," said Studdard ... little love with an event featuring Ruben singing Luther Vandross songs backed up by the Alabama Symphony ...