Zendaya stopped through to chat with Garrett from Elvis Duran and the Z100 Morning Show. What she did not know was that Garrett devised a plan to prank her by having her "Dancing With The Stars" partner, Valentin Chmerkovskiy, call in and pretend to be her "biggest fan".

Watch below to see what happens when her biggest fan finds her number online and calls it during the middle of the interview.  

Photos: Zendaya In-Studio