It's A Clay Aiken Jr

(TMZ) TMZ broke the bizzaro story in the first place -- that Clay Aiken is having a Claby -- and now we know the sex! No, not Clay's, the Claby!

He's having a boy! Multiple TMZ spies say when the kid takes his first bow in August, there will be gonads attached.

Clay Aiken showed a flair of masculinity last night as he went after TMZ's D.C. photog who wanted some info on the Claby. - Watch the video here

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