Ahead of Kim Kardashian's big wedding in Europe, Khloe Kardashian and her boyfriend, rapper French Montana, visited Universal Studios Islands of Adventure in Orlando, Fla., on Saturday, May 17 Credit: ROBERTO GONZALEZ/UNIVERSAL ORLANDO

Khloe Kardashian's fighting off enemies—in more ways than one. The Keeping Up With the Kardashians reality star and her boyfriend, rapper French Montana, visited Universal Studios in Orlando, Fla., on Saturday, May 17, about a week before big sister Kim Kardashian's wedding extravaganza in Europe.

"Khloe was there with French Montana and a group of friends and enjoyed visiting both Islands of Adventure and Universal Studios theme parks," a source tells Us Weekly of the couple's outing. "They had a blast and wanted to meet and take pics with every superhero in the park!"

Indeed, Kardashian, 29, made sure to pose solo with Marvel superheroes Spider-Man, Wolverine and Captain America while visiting the park. In one photo, she gave some attitude while surrounded by the trio as she wore an all black outfit with ripped pants.

Kardashian may have jokingly been fighting crime, but on Tuesday the fun took a serious turn when she lashed out for real via Twitter. The reason? On May 19, brother Rob Kardashian was ruthlessly teased about his weight after a new photo surfaced of him and mom Kris Jenner jetting off to Europe for the wedding.

"I love you @robkardashian. Some of you people are disgusting for calling others names and picking on them," she wrote. "You should be ashamed of your self. Your words are cutting deeper then you know and are possible leaving lifetime scars! What shallow souls some of you are. Its sickening to critique anyone off of their appearance. Grow up!"