Taylor Swift filled her latest music video "Bad Blood" with many of her best friends, but no one was more thrilled to appear in the "Tron"-like video than Mariska Hargitay.

"It's just so awesome and it makes me feel super badass," Hargitay told Seth Meyers on "Late Night" on Monday night.

Swift premiered the "Bad Blood" video at the Billboard Music Awards on Sunday night and Hargitay plays a characters called "Justice" alongside "Grey's Anatomy" star Ellen Pompeo, who goes by the name "Luna." Both TV actresses were able to choose their monikers.

Hargitay gushed about working with Swift and thanked the pop star for making her that much cooler with "the kids."

"I feel like my cool factor went up with the kids and I'm really grateful Taylor!" she said.

The Emmy-winning actress also had to thank Swift for giving her and her husband, Peter Hermann, a ride home once after an Ingrid Michaelson concert. Hargitay and Hermann found themselves stranded in Queens, N.Y. and Swift was nice enough to offer them a ride home.

The Swift-itus infects the whole Hargitay family. Her 4-year-old daughter Amaya demands to hear "Welcome to New York" every morning at breakfast.