Sierra is shown to be a major fan of Chris in the first few episodes of Total Drama World Tour, already knowing too much about him and the other contestants. Chris at first is impressed, but becomes very annoyed with her. After finally annoying Chris to no end in Broadway, Baby!, Chris loses it and tells her to stop, which makes Sierra question her obsession and pull back on her interest in him. In particular, she seems to less state that she likes Chris in later episodes, but instead says that it's her mom who is obsessed with him. By the end of the season, Chris finally reaches his breaking point when Sierra blows up his plane in Awwwwww, Drumheller, and abandons an injured Sierra in Planes, Trains, and Hot Air Mobiles. Sierra finally realizes how evil and mean Chris is and breaks any interest in him and specifically tells her mom to stop having any interest in him as well.
As seen in this episode, Sierra is actually a fan of Chris, unlike everyone else, knowing how many dogs he has, where he buys his pants, etc.
Throughout the episode, Sierra is shown to be constantly complimenting Chris and gives the impression that she is a big fan of him, although Chris seems to find her annoying. Sierra also seems to find Chris attractive, as she says that she, "hearts his limits" when he was explaining the rules, and later suggests that her team be named, "Team Chris Is Really Really Really Really Hot" which Chris happily approves of, despite her teammates' complaints.
Sierra compliments Chris, telling him how he is the best decision maker ever to let Izzy and herself switch teams, which succeeds because of Chris's narcissism.
Sierra reveals that his favorite drinks are tomato juice and hot cocoa. Chris wonders how she got that information because it was not on the fansite. Sierra says she went to his old high school to ask his teachers so she could write an unofficial biography. When she says what her old teachers said, Chris puts his hand in front of her mouth to prevent her from spilling any more information about him.
Both Alejandro and Heather refer to Sierra as Chris's favorite. When Chris introduces the first challenge, Sierra compliments his ideas. Chris thanks her and says it's nice to be appreciated, only for Sierra to declares she "loves" Chris and shows off her knowledge of him by revealing he once made videos about talking cats.
When Alejandro sees Sierra accidentally embarrass Chris, he decides to manipulate Sierra into thinking Chris misses his glory days and make Sierra ruin Chris's opinion of her. As Sierra mentions the embarrassing aspects of Chris's career such as his cooking show, which was canceled after one episode, and him being in a boy band, the first real sign of a conflict between them begins. This eventually irritates Chris so much that he yells at her to zip it permanently the next time she begins to talk to him.
When Team Amazon gets their Swiss outfits, Sierra tells her team that maybe the losers get the best prize, which greatly annoys Chris. With an irritated expression on his face, he tells her she can think whatever she wants to think. Just moments later Sierra begs Chris to let her wear "Der Penalty-Hosen", to which Chris makes Cody wear them instead, saying that if she actually wanted to wear them he wouldn't give her that privilege. After Sierra wins the challenge and falls asleep on the platform, Chris starts to electrocute her to wake her up.
When Chris calls for a music number Sierra is more than happy to do it for Chris, despite being in a sorrowful mood at the time.
Sierra shares more personal knowledge about Chris being born in Newfoundland, saying it was "the birthplace of the most beautiful host." to which Chris responds, flattered, "Awww thanks!"
Sierra is annoyed that Chris calls Cody a girl in this episode. Before the hurdle challenge, Chris says she is creepy for knowing so much about everyone.
Sierra reveals that her mom has a crush on Chris in this episode, and she is just now starting to question it. Chris gives her a hard time when she desperately wants Cody as a husband. In the confessional, she calls Chris "old" when mentioning the four things that a bride needs at a wedding.
Sierra states that Chris looks like he has been working out in this episode, and shows obvious attraction towards him.
When Sierra comes with her barrel first, Chris offers her to join his party, but she refuses, so she can prepare a birthday cake for Cody. Chris is furious at Sierra for blowing up his plane and eliminates her on the spot out of pure rage, despite the fact that she won invincibility by digging up the first oil barrel.
Despite all the hardships she and all the other contestants have been put through, it wasn't until this episode that Sierra finally grows to hate Chris. Chris refuses to help her get out of Drumheller and tells her to find a way home like all the previous losers. In the confessional, Sierra tells her mom to dismantle the Chris shrine and put away the Chris related museum before she gets home.
Sierra is seen laughing as Chris's boat sinks, along with all of the other contestants.
While Chris introduces the contestants, he accidentally calls Sierra "Total Drama's biggest stalker," before correcting himself and changes it to "blogger."
Throughout the episode, Chris is disturbed by Sierra's behavior; from her new obsession with Cameron to her naming a two headed rat after Cody, and believes that he should only bring back the "sane" contestants for future seasons.
- According to Oh No U Di'n't!!!, Sierra named all her fish after Chris.
- This interaction is similar to Chris's interaction with Topher, as both involved Chris and one of his fans.
- Both times Chris initially took pride in his fan, but eventually grew to hate them.
- Both owned a mutated creature as a pet:
|Interactions with||Everyone | Alejandro | Chef | Courtney | Dakota | Duncan | Ella | Ezekiel | Gwen | Heather | Interns | Owen | Sierra | Topher|
|Other content||Chris's cell phone | Larry|
|Interactions with||Alejandro | Cameron | Chris | Cody | Gwen | Heather|
|Other content||Cody Jr. | Cody 1 and 2 | Sierra's smartphone|