any manga like this ?

Nousatsu Junkie - manga about popular models

Naka is an aspiring young model with a problem: her face tenses up into a terrifying spectacle whenever she gets nervous on photo shoots! Naka's rival is Umi, the hottest model at their agency. But Naka soon discovers Umi's secret--and hilarity ensues behind the cameras!

Film Girl - bout models too xD

Nakamura Mei is a very simple high school girl. While at a cafe with her friends, they bump in to -none other than- the model Shirou's table. Mei apologizes and that's when Shirou notices something. Grabbing her he takes her outside with him and reveals that Mei was once a kids model - and that he's her idol-otaku!?

Kodomo no Omocha - in this case only girl is celebrity, but It's still very good, I recommend it!

Sana Kurata, a child actress, faces many problems in her classroom, including a major one - her bullying classmate, Akito Hayama. Sana's outgoing and friendly nature leads her to work towards correcting all of the problems around her. Her 'meddling' irritates Hayama but at the same time captivates him, just as Hayama's gloomy nature irritates Sana and compels her to change him. As these two opposites attract each other, they face many hardships which bring them closer to a mutual understanding.

Full Moon wo Sagashite - about singers

12 year old Mitsuki wants to be a singer because of a promise she made with her childhood love, however a form of throat cancer is holding her back. One day she find two strange characters in her room, Takuto and Meroko, who are gods of death. She finds out she only has a certain amount of time to live, and wants nothing more in that time then to become a singer. The two shinigami show sympathy for her, and decide to help her reach her goal by transforming her into a 16 year old girl.

Cat Street - there's no two celebrities, It's about a girl who wants to become actor again after childhood trauma, I highly recommend it though

The story centers around Keito Aoyama, a former famous child actor. Due to a childhood incident, she retired from her career early and withdrew from normal society. Now 16, she passes her days in boredom and without purpose. But one day she runs into a stranger who takes her to El Liston--a free school for high school students like herself, who don't have a place where they belong. Though hesitant at first, Keito decides to enter El Liston and subsequently, she begins a new stage in her life. With the help of her only remaining childhood friend, Taiyou, and her new classmates Rei, Momiji, and Kouichi, Keito slowly finds the courage to open up to others and to accept their support. Will Keito return to acting? Will she find true friends? Love?

Film Girl Manga

I can't think of many others that are like nana and skip beat but if you like romance/comedy then you could try these:

Himekei Doll: Ayumu is absolutely in love with the young fashion designer Renji. She even enrolls in the same high school as him! After a certain incident, Renji finds out just how much Ayumu loves him, and that she's determined to help him with his clothing line, [BanDit]. He agrees to let her help him, but finds out that she could also be a talented designer (although she can't sew at all) herself!

Teen Spirit: Hwee Kang is in a band with all his friends and is recruited by a well known company called JBL because they all have the looks of stars. However, there are high expectations. During the audition, what surprise will they give everyone, and what will Hwee Kang do?

or there is this one but i don't know much about it

Fallen Angels: Hajin Seo used to be a cheerful girl. But while trying to protect her friend Mina, she had to commit a series of things that could have been avoided. And the incident caused her to think she killed the friend. Mina, however, is not dead but she has been scarred severely. A teen star named Yunu who met her before the incident wants to see her old self again. He wants to bring his first love back to how she was before. The hot Jeha Han is nice to her, the loner girl, at first. But he has a secret. He is the brother of Mina, and he is willing to do anything to get revenge on the person who harmed her. Hemi and Yungju will pair together in order to get their unrequited love fulfilled. Hemi wants Yunu, and Yungju wants Jeha. And all their arrows point directly at Hajin, who is scarred already. Once she was an angel, the popular girl of the school. But now she is a fallen one, one that can only watch from behind as many go against her.

Venus ni Arazu: Misyoshi Yoshiko is working her way as a model by doing various modeling gigs for her agency. After one of those gigs causes her to lose her job as a model, she now faces a desperate situation of being broke and unemployed. Things start to look up when she gets offered another modeling job, but this time it’s modeling for Chuujou Tarou, the lecherous sculptor who got her fired in the first place! How will Yoshiko handle working for a perverted employer who can’t keep his hands off her–not because he’s attracted to her, but because he likes her bone structure?!

if you dont like any of these then try http//www.mangareader.net/search/?w=&rd=0&status=0&order=0&genre=0010000000000000000010000000000000000&p=0

to see if you can find any others you may like

In Full Moon o Sagashite, The main female character has 1 year to live and is greeted by two shimigami, they pursue her wish by transforming her into a 16 year old so she can sing.

And soon she starts to fall for one of her shimigamis. It's a great read.

More info: http://en.wikipedia.org/wiki/Full_Moon_o_Sagashite

You can read it at:

http://www.mangareader.net/197/full-moon-wo-sagash...

Even though it may not sound funny, it is.

Its genres are,

Comedy, Drama, Fantasy, Romance, Shoujo, Slice of life, and Tragedy.

Maybe try Full Moon wo Sagashite

full moon wo sagashite is similar to your description, except the main character doesn't fall in love with a celebrity, just a guy she knows. anyways, this anime is awesome, you should watch it!!!!!!