Last night Justin Timberlake stopped by the Tonight Show with Jimmy Fallon and shared some sweet snaps of his darling five-month-old son, Silas. And that's one cute baby boy!

While on the late night show, the "SexyBack" singer talked about being a first time father, saying, "It is the most insanely amazing, wonderful, unbelievable thing to ever happen to you."

The 34-year-old superstar then shared a few photos of the new fam, one of him holding his blue-eyed babe up to the camera, another of wife Jessica Biel kissing Silas, who was wrapped in an elephant towel after his bath. Justin gushed, "That's post-bathtime right there."

In addition to the adorbs snaps, JT also kicked off the show by showing off their rap skills in a "History of Hip Hop 6" segment. The boys took the audience through six minutes of hip hop hits and killed it!