Cameo appearances can be fun additions to TV shows. There's no doubt that many stars have done cameos in various series, bringing a special and fun feel to the shows they appear in. Some have more meaningful purposes, such as Sylvester Stallone's This Is Us appearance, while Ray Romano's stint on Hannah Montana proved to be good for a quick laugh.

RELATED: 10 Best Movie Cameos Of All Time, Ranked

Nevertheless, whether a series chooses to integrate enjoyable nostalgia or write clever storylines around someone's cameo, certain celebrity appearances will remain memorable, withstanding the test of time. While most cameo appearances on television are effectively incorporated, some simply possess great aspects that make them the best.

10 Nicole Richie Played A Funny And Unique Character In Grace And Frankie

Nicole Richie looking at Jane Fonda

Nicole Richie played eccentric pop star "Kareena G" in Grace and Frankie. Kareen G's character bought Grace and Frankie's home to lay low for a while, but Grace and Frankie refuse to leave. After some strong convincing, Kareena agrees to give it back.

Richie's cameo appearance included several funny moments, like showing them a motto she has tattooed in Morse code and Frankie teaching her a bizarre chant. Richie has a charming spirit to her which nicely complemented the main cast. Though seemingly an unusual inclusion, her appearance proved to be thoroughly entertaining.

9 Britney Spears Brought Her Charisma To Jane The Virgin

Britney Spears at a front desk with one hand on her hip

In Jane The Virgin, Milos hired Britney Spears as the main musical act for his wedding. Spears' appearance consists of her walking around with a group of dancers, dancing with Jane, and Rogelio resolving an issue they had.

RELATED: 10 Most Shocking Bombshells From Controlling Britney Spears

Spears was a fun addition who brought considerable star power to the show. Fans were also pleased because Rogelio's character always boasts about having many A-list celebrity connections in Jane The Virgin, and to see the stars he claims to be friends with actually appear is usually a comical surprise.

8 Jennifer Lopez's Second Cameo On Will & Grace Was Even Funnier Than The First

Jennifer Lopez shooting Shades of Blue with Jack

Jennifer Lopez shoots an episode of Shades of Blue in her second Will & Grace appearance. Jack plays a corpse and hilariously ruins multiple takes by asking if she remembers him, laughing, and trying to take a selfie with her.

Fed up, Lopez then shows Jack how to be a corpse by silently lying still. She exhibits a more serious side of herself this time while proving how multifaceted she is as an actress. Lopez also has an easy chemistry with Will & Grace's cast, so it wasn't surprising that this cameo turned out so well.

7 Ed Sheeran Was Perfectly Incorporated Into Game Of Thrones

Ed Sheeran looking behind him

Ed Sheeran made a cameo appearance in Season 7 of Game of Thrones as a Lannister soldier. The feel-good scene features Sheeran beautifully singing "Hands of Gold" with his fellow soldiers, then Arya joins them for a meal and honest conversation.

Though not having many lines, Sheeran seemed comfortable taking on the role, and many fans felt like he was a natural part of Game of Thrones' fantastical world. Viewers could also sense the effortless camaraderie Sheeran's character has with the others, which made for a perfect appearance.

6 The Beach Boys Made An Exciting Full House Cameo

A Beach Boy singing with DJ and Stephanie

In Full House, D.J. wins two tickets to the Beach Boys' San Francisco concert and has a difficult time deciding which family member should have the second ticket. Luckily, the Beach Boys pay the Tanner family a visit and invite everyone to the show.

RELATED: The 10 Best Beatles Cameos in Comics

The Beach Boys perform their hit song "Kokomo," and also have the Tanners on stage to sing "Barbara Ann." The iconic band provide an exciting experience by doing what they do best, and a disappointing situation for DJ became a happy ending for the whole family.

5 Stephen Hawking Hilariously Bested A Main Character In The Big Bang Theory

Stephen Hawking speaking with Sheldon

In The Big Bang Theory, Howard is asked to do maintenance work on Stephen Hawking's wheelchair. Dying to meet the renowned physicist, Sheldon asks Howard to give Hawking his paper. After Hawking eventually reads it, he wants to meet with Sheldon.

During their meeting, not only does Hawking exhibit some funny arrogance, but also points out an error Sheldon made. Sheldon then humorously faints from embarrassment. Sheldon is a very arrogant character, so it's safe to say that viewers were happy to witness him being humbled by Hawking.

4 Iyanla Vanzant Was A Necessary Eye-Opener In Greenleaf

Iyanla Vanzant in front of a car with Pastor Maxine and Mae

Iyanla Vanzant made a cameo appearance as herself in Greenleaf. Vanzant's known for her life-changing work with people who need emotional healing, and she brought this refreshing expertise to the show.

In the show, Vanzant is hired by Mae to help Charity as Charity goes through a challenging time and believes no one cares about her. Vanzant's no-nonsense but nurturing approach includes wanting to know Charity's true feelings by asking honest questions and encouraging her parents to listen to her. As an intense drama series with numerous secrets, having Vanzant appear to speak the truth seemed necessary.

3 Shakira Was A Brilliant Addition To Wizards Of Waverly Place

Shakira singing and dancing with Alex in the sub shop

In Wizards of Waverly Place, the Russos discover that Shakira is actually Kelbo, who created the singer using a shapeshifting spell. Kelbo then runs into trouble after he can't control when he turns into her. From trying to keep this a secret to Kelbo turning back into himself in front of unknowing fans, Shakira's cameo is arguably one of the funniest on TV. Viewers were also given a nice musical performance as Alex and Shakira perform "Gypsy," which was Shakira's latest single at the time. Needless to say, Shakira's appearance didn't disappoint.

2 One Direction Shined While Singing And Acting In ICarly

One Direction and the iCarly cast comforting Harry while he's sick

In iCarly's, "iGo One Direction," One Direction is scheduled to perform "What Makes You Beautiful" on Carly's internet show when bandmate Harry Styles falls ill. Despite recovering, Styles continues milking the illness to receive special treatment. After the band pretends to replace him, he then insists on rejoining them for their upcoming performance.

RELATED: 10 Anime Endings Perfect For A Try Not To Sing Challenge

This creative storyline allowed One Direction to give fans a great musical performance and showcase their acting talents. For fans, it was nice seeing them practice another ability and sing on a different platform.

1 Viewers Were Nostalgic Over Elizabeth Shue's Appearance In Cobra Kai

Ali Mills with Daniel and Johnny at a a party

Elizabeth Shue played Ali Mills in The Karate Kid film franchise, then reprised this role in the franchise's TV sequel, Cobra Kai. During Season 3 of Cobra Kai, Johnny reconnects with Ali online and they eventually agree to meet face-to-face. The two reminisce, but also reignite both positive and negative feelings, especially when bumping into Daniel at a party.

Overall, it was a highly anticipated cameo, and Shue effortlessly embodied Ali's character once again. Viewers were given another dose of Cobra Kai's quality nostalgic moments with her appearance.

NEXT: 10 Star Wars Cameos To Look For In The Obi-Wan Kenobi Series