"Just Friends" is the second segment of the thirty-third episode of Star vs. the Forces of Evil. It premiered on February 23, 2017, and is the second segment of the twentieth episode in the second season.
It is time for bed at the Diaz House, and Star and Marco are in the bathroom brushing their teeth with singing Love Sentence tooth brushes. As they brush they lip-sync to their favorite song played by their tooth brushes, "Just Friends". Star and Marco are huge fans of Love Sentence, and much to Marco's joy Star has bought concert tickets to see them the following day. Star even has a bigger surprise for Marco, she has also invited Jackie to go with them since she and Marco are dating. While Star is excited for the three of them to be hanging out, Marco is worried that, with Star around, Jackie will realize he is not cool. But Star assures him things will be fine. The next day, Star and Marco are all set to go to the concert wearing matching T-shirts that Star made. While waiting for Jackie, Marco still remains worried about the three of them going together. Again Star assures him that everything will be fine. At last Jackie shows up with matching concert skateboards for them to ride to the concert.
As they make their way to the the concert, Star and Jackie are bonding over their love for Love Sentence. They talk about the number of times the band had broken up. Meanwhile, Marco is falling behind, and is inexplicably struck by bad luck: his T-shirt is several sizes too small, and while skateboarding to the concert, he trips over and injures a family of ducks. Star, Jackie and Marco take the ducks to the vet, and after they are treated they take them to the riverbed that Star once ran away to. As they continue to enjoy each other's company, Marco begins to feel left out and suggests that Star and Jackie go to the concert without him. Jackie assures him that she likes spending time with him, and Star suggests they go and have more fun together at the concert.
At the concert, Love Sentence takes to the stage and begins singing "Just Friends". Star, Marco and Jackie take each other's hands and lip-sync to the song. During the performance, numerous couples in the audience start kissing, including Marco and Jackie. Feeling left out, Star leaves her seat and goes down to the front row. Marco follows her shortly after, and apologizes for making Star feel uncomfortable. Star assures Marco that she is fine, and tells him to go and be with his girlfriend. Showing his gratitude, Marco gives Star a hug and calls her "the best friend a guy could have". Then he goes to join Jackie and Star leaves the concert auditorium alone, just as Love Sentence starts to sing "Too Little Too Late". With a forced smile on her face, Star uses her wand to destroy a Love Sentence billboard.
- Eden Sher as Star Butterfly
- Adam McArthur as Marco Diaz
- Grey DeLisle as Jackie-Lynn Thomas
- Nick Lachey as Justin Towers
- Nick Lachey, lead singer of the band 98 Degrees, guest-stars as Love Sentence lead singer Justin Towers for the second time after "Friendenemies".
- Star recalls the events of "Star vs. Echo Creek".
- On May 13, 2017, this episode and "Collateral Damage" was removed from Disney XD's television schedule and website, presumably due to its depiction of several same-gender couples kissing.