The 19-year-old, who is signed to Diddy's Bad Boy label, is a huge fan of the singer - but insists her music is all her own.
Cassie says: "I'd love to emulate her career. She's incredible, from her moves to her voice."
"I'm a diehard fan of Janet but a lot of people compare my video for Me + U to hers for Pleasure Principle. I was just rehearsing in the studio, they filmed me and the record label thought it would be great for the video."