Students at UNLV were totally shocked when Katy Perry – rocking a “Nasty Woman” tee and bold red lipstick – showed up at their dorm rooms on Saturday (October 22) in Las Vegas!

The 31-year-old singer was spotted snapping selfies with a pair of young women while she flashed a “Love Trumps Hate” sign.

Katy had a blast knocking on doors, sharing personal stories, and trying to drum up votes for Democratic presidential nominee Hillary Clinton.

“We’re out here campaigning for Hillary Clinton. Ever heard of her?” Katy asked some students inside their room (via Associated Press). “Because there’s no other alternative. We need our issues heard, we need our bodies taken care of, we need all that choice.”

Katy was also spotted cheering as former Nevada Attorney General and Democratic U.S. Senate candidate Catherine Cortez Masto spoke at an early vote rally.

Today marks the first day for early voting in Nevada ahead of the November 8 general election.

30+ pictures inside of Katy Perry visiting UNLV dorms…