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Photos: Justin Timberlake shows off baby son Silas

Justin Timberlake can't stop talking about his baby, and he brought pictures of his adorable 5-month-old son Silas onto "Fallon Tonight" to prove it.

Timberlake brought on some family photos and gushed about how much he enjoyed fatherhood.

"It is the most insanely amazing, wonderful, unbelievable thing to ever happen to you," he said as the audience screamed, "Aww!"

The feeling is mutual -- Silas is a daddy's boy: His first word was "Dada."

Timberlake shared a photo of himself holding up Silas, and another picture of his wife, Jessica Biel, kissing Silas after a bath.

We think we know who's tearin' up Timberlake's heart these days.

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