Whitney brought along seven of her closest friends to Cabo (sadly, there was no sign of her former co-star, Lauren Conrad), where they stayed at the luxurious Cape Hotel. The group enjoyed some fun in the sun, and indulged in fancy grub.
Whitney's picture-perfect Cabo trip is actually her second bachelorette party. In August, she reunited with another former Hills co-star, Brody Jenner, during her celebration in Las Vegas.
The reality star has been engaged to her fiance, Tim Rosenman, since November 2013. The couple actually met on the set of MTV's The City, for which Tim served as an associate producer.
"When I did television, scandal was always around me," the 29-year-old said. "And I think one of the best things [about that] for me is that your life becomes more big picture. You have to develop a thick skin really quickly. It toughened me up, which is good."