I don't think Julie would 'play' a part in this Prank, she's the Host, period. She said someone would be evicted and off to the jury house, and I can't see that being a lie to the viewers or the audience honestly. Also, this came from the CBS website contest rules (bolded mine):
America's Prankster Vote Description: During the Voting Period, viewers of the Big Brother 21 television program will be asked to interact with the show by voting for a Houseguest they want to see become America's Prankster via the platform stated below. The eligible Houseguest who receives the most votes during the Voting Period will be named America's Prankster, and will be given the power to secretly control one nominee for eviction during the applicable week, by selecting one nominee at the Nomination Ceremony. America's Prankster will also choose a replacement nominee if their original nominee is vetoed during the Veto Meeting. Evicted Houseguests and the current Head of Household of the applicable week are not eligible to receive votes in the Program. Viewers will vote via the BB Web Site. There is a maximum of ten (10) votes per registered user during the Voting Period.
I don't really trust Nick, but man, that'd make everyone's head spin, especially Christie. But I don't know if I can bring myself to vote for him. And oddly enough, I'd want Christie out before Jackson. I cannot stand her more than I can't stand Jackson, lol. I'd love to see Christie and Tommy up on the block together. I split my votes today between Cliff and Nicole - but I may change the rest of my votes up, I really don't know yet. So far I'm seeing a lot of mixed ideas, and that could mean anyone could get it.
americas-prankster-vote This is the one I used.