When done correctly, a celebrity cameo on a TV show can be the perfect little Easter Egg for viewers. It can give actors who have fallen into typecasting an opportunity to explore a new character in a low risk and fun way. It can also be a way for celebs to work with a spouse or good friend they don’t normally get to share the screen with.

Cameos for the sake of cameos, like when a show is losing viewers and looking to remain relevant, can come off as plain pathetic. While it’s fun to spot a favourite celeb out of their usual spot, some cameos are boring, predictable, and are even forgettable. Here are 10 useless celebrity cameos as seen on TV and five that truly stole the show.

15 Useless Cameo - Paris Hilton On Veronica Mars

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Known more for her reality TV than her acting chops, putting Paris Hilton beside someone who can really act, like Kristen Bell, really emphasizes her shortcomings. It seems the producers also realized this on Veronica Mars because despite getting in the big name, her character didn’t really do much on the show with a meh storyline to match her ability.

14 Useless Cameo - Oprah On 30 Rock

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Dream sequences are about as boring as they come on TV, and audiences just expected better from Tina Fey and her team of writers. Watching Oprah just ‘be Oprah’ with Liz Lemon just seemed lazy. Pairing up Oprah and her no-nonsense attitude with one of the odder characters like Jenna or Tracy would have made for some very interesting TV. It was a missed opportunity!

13 Useless Cameo - Brad Pitt On Friends

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You can’t blame Friends producers for wanting to cash in on Jennifer Aniston’s marriage to heartthrob Brad Pitt. An episode that was cute at the time, focused on Brad’s character and Ross being members of a ‘we hate Rachel’ club in High School, doesn’t age well in light of the real-life divorce of the couple.

12 Stole The Show - Carrie Fisher On Big Bang Theory

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Star Wars Fanboys tuned in to witness the first time that Carrie Fisher (Princess Leia) and James Earl Jones (Darth Vader) ever faced off in real life (they never filmed together on the set of Star Wars). Who doesn’t love Carrie calling after the voice of Vader, “It’s not funny anymore, James” of his repeated game of ding dong ditch?

11 Useless Cameo - Larry David On Hannah Montana

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Odds are the fans of Larry David aren’t going to be tuning into Hannah Montana with their tween children. This one missed the mark mostly because it’s unlikely that anyone watching the show would even understand who David was. It was said he made his cameo because his children loved the show and wanted him to do it.

10 Useless Cameo - Justin Bieber On CSI

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Justin Bieber played a troubled young man on CSI. Although his performance was okay for someone who had never acted, the way that he acted behind the scenes really stunk. He reportedly locked one of the producers in a closet and punched a cake that was on the table for the cast and crew to enjoy. Turns out the Biebs was just as bratty then as he is today.

9 Stole The Show - Shannen Doherty on Heathers Reboot

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Cult Classic movie Heathers starring Christian Slater, Winona Ryder, and Shannen Doherty is a clever, dark comedy. When they decided to bring it back for TV, who better to portray JD’s mom who meets a bad end, complete with red scrunchy, but the original Heather Duke herself! Doherty said once she read the script for the revival, she was in for the small but noteworthy cameo!

8 Useless Cameo - Chris Brown On Blackish

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Blackish is a family focused show. Bringing in a famous person known for being abusive towards women into prime time, isn’t sending the right message. He’s known as a bad boy who clearly has some issues he needs to work out. Why not give a celeb cameo to someone who is going to be a positive role model instead?

7 Stole The Show - Prince On New Girl

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It’s hard to imagine the literal Prince of pop watching TV, but Prince was a huge fan of New Girl. So much so that he wrote to the show and asked to be on an episode. His performance was strange, eccentric, and everything fans loved about him. Prince was said to contribute to the script, making his appearance even better!

6 Useless Cameo - Lisa Loeb On Gossip Girl

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Writers on Gossip Girl constantly wanted to remind viewers that Rufus Humphrey was a big deal in the 1990’s alternative music scene. To help legitimize this claim they brought in 1990’s sweetheart Lisa Loeb. Her cameo had no other purpose. Oh, and that (spoiler alert) Loeb is who he ended up with romantically in another odd cameo on the last episode.