The 21-year-old beauty was partying at New York nightclub Provocateur, when she decided to spin some tracks with the DJ, reported Contactmusic.
When it was Tiesto's turn to take over the decks, Kate joined him in the DJ booth, taking tips from the star and carefully watching him work.
The model also clicked pictures.
"She spent most of her time in the booth getting tips from Tiesto and taking photos," a source said.