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The clip opens with a slew of screaming girls watching the former football player shower on the beach.
One contestant says, "He is literally like a chiseled God to me."
But the mood gets a lot more serious as Underwood talks about his virginity, which was a major storyline when he was featured last season on "The Bachelorette."
"I'm here to fall in love, so hopefully by the end of this, I'm down on one knee," he says.
There are also a lot of tears, as the girls deal with their emotions and a quest to meet their soulmate.
Underwood also seems to be feeling the pressure as he breaks down himself, adding, "I'm scared."
The new season of "The Bachelor" begins Jan. 7.