Ariana Grande has gone from Nickolodeon and nauseatingly cute shows like Cat and Sam and Victorious to being a pop star, with a public persona that is a combination of stilettos and little girl frills that send out mixed messages. Grande combines blatant sex appeal with a child-woman vibe that is confusing, to say the least. Now in her mid-20s, many say it's time for her to grow up. We're not holding our breath on that one.

But the simple fact is Ariana Grande has adoring fans. But she also has an "image" problem. Rumors of diva-like behavior and diva demands just won't go away. And it seems that she has a love-hate, mostly hate, things going on with her fans. Boyfriends have come and gone, amid rumors of her cheating and her merely using celebrity boyfriends to further her career.

And all of that is before we get into her feuds with a long, long list of celebrities. Most cite her arrogance and demands. Some say she is just downright rude. So, let's look at 15 not-so-sweet facts about Ariana Grande. Is she BFF material? Definitely not!

15 Her Life Coach Quit Because She Was So Impossible

“He just couldn’t take it anymore,” an insider tells New York Post’s Page Six about Grande’s unnamed life coach. “Everything people are saying about her is true.” And what are they saying? She is difficult, demanding, immature, a diva-extraordinaire, and only thinks about herself and what she wants. Oh dear.

14 Diva Demands - It's Like The President's In Town

There are demands for the size and kind of dressing room she will agree to. There are restrictions on how she is photographed, from what angle and how the lighting is done. At red carpet events, her team storm in and make certain Grande's is in the right position at the right time. The media gets a "no go" list up-front. Having the President (or diva Mariah Carey) in would be easier! Her demands are endless.

RELATED: 20 Things Ariana Grande Wants Us To Forget About Her Past

13 She Stormed Out Of A Photoshoot

It's 2014. Ariana Grande is gushing, saying she was excited to be in Sydney, Australia. She was there to promote her My Everything album. And it was all sweetness and light until the photoshoot rolled around. There was, of course, a list of demands, including the requirement that she could not be shot in natural light. The photographer did the best he could, but diva Ariana was not pleased and stormed out, leaving the poor photographer scratching his head and wondering what her problem was.

12 "Borrows" Songs From Other Singer/Songwriters

"You're a thief," rapper Soulja Boy tweeted to Grande about her "borrowing" from his song "Soldier Boy Swag". Rappers Princess Noia and 2 Chainz said much the same thing about Ariana Grande's song "7 Rings". According to the rappers, she stole lyrics and "flow". 2 Chainz complained that Grande stole the idea of the pink trap houses the rapper had used in a music video for her own video. Did she come clean? Of course not.

RELATED: A Deep Dive Into Ariana Grande's Career, In 20 Pictures

11 Alex DeLeon: Most Stuck Up, Disrespectful Person I Ever Met

Alex DeLeon is the lead singer for The Cab. He only met Grande the once, but she obviously made a huge impression on him. He tweeted,  I  "hope none of my fans ever have the displeasure of meeting ‪@ArianaGrande. most stuck up, disrespectful person I've ever met in this industry." It's no exaggeration to say that the list of celebrities who have dissed the pint-singer is long. Read on!

10 Jennette McCurdy: She's A Drama Queen And A Leech

Back in the day, Jennette McCurdy and Ariana Grande were in Nickelodeon's Sam and Cat together. Grande was Cat, hence her use of cat ears. Anyway, the two were supposedly friends. The only thing is McCurdy has called Grande a "leech" and a "drama queen". She Tweeted:  "You've sucked the life right out of me, and I want my life back." Hey, Jenette don't hold back. Go on and tell us what you really think!

9 Disses And Dumps On Her Fans

Sometimes Grande will sign autographs for eager fans. She may have a smile on her face when she doing those autographs, but on more than one occasion she has demonstrated a deep loathing for her fans. Says a source of one occasion: “She did autographs and pics and was all smiles until she got into the elevator. And as soon as the doors shut she said, ‘I hope they all f—king die.’ ” Not nice, but very Ariana.

8 That Infamous Donut Licking Incident

Five years ago, Grande was in a donut shop with some friends and when the staff wasn't looking Arian proceeded to lick some donuts she had no intention of buying. To make it even worse, she was shouting "I hate America". Of course, it was all caught on a surveillance camera and so she could not, as she usually does, deny it. A lukewarm apology followed. No, nobody believed she was even a little sorry.

7 The Dark Side Of The Diva

Anyone who behaves the way Ariana Grande does must have their own special demons. As a child, she wanted a Freddy Krueger mask. That speaks volumes! Staffers say she can be moody, dark even. On her good days, she's okay. But catch her during one of her frequent bad mood days and you may be in for trouble. Witness the fact she wished her fans would die episode if you have any doubts. Ignore Ariana's dark side at your peril.

6 Pitches Fits If You Don't Photograph Her Good Side

Apparently, Ariana's staff can be very aggressive, barging in on red carpet events and photoshoots with lists of demands. She cannot, they say, be filmed in natural light. There must be special lighting. She must only be filmed from her "good side", the left. Then Ariana sails in acting like a petulant child and gosh help the photographer or interviewer who doesn't abide by her diva demands.

5 Uses Relationships To Further Her Career

In 2014, her "thing" with rapper Big Sean included several collaborations on songs. Very good for Ariana's career. And then The Wanted's Nathan Sykes released an album inspired by his relationship with Grande that helped her cause no end. And let's face it, her very public relationship and engagement to Saturday Night Live's Pete Davidson got her a lot of much-needed positive press. Then she reportedly dumped him.

RELATED:  15 Photos Of Pete Davidson's Stunning Exes

4 She's A Cheater

Cheating accusations seem to follow Grande around. Boyfriend Jai Brooks accused her of cheating on him with Nathan Sykes. She was accused of cheating on then-boyfriend rapper Mac Miller with Pete Davidson. Some even swear blind she cheated on Davidson with Big Sean. The fact is simply that Ariana does what she wants to do when she wants to do it. Never mind others feeling or her commitment to them.

3 The Princess Syndrome: Condescending Behavior

Ariana Grande is a huge fan of Mariah Carey. She even imitates some of her vocals and moves. But she also imitates Carey's notorious diva-like behavior and demands. Things have to be just so. Certain food has to be in her dressing room. The media is given a long list of  "no go" areas. There are even stories of Grande demanding staff carry her from one place to the other if she is tired. Clearly, when (and if) she grows up, she wants to be just like Mariah.

2 Unprofessional And Arrogant Behavior

Despite being told not to, she cursed on Saturday Night Live. She dropped the "F" bomb in the middle of a song, as a matter of fact. And no matter how much a routine is rehearsed, Ariana is just as likely as not to do her own thing, calling attention to herself and leaving her fellow performers in the lurch. And, as we have seen when she stormed out of a photoshoot, it's her way or the highway.

1 Her Staff Bullies People

One year at the American Music Awards, Guiliana Rancic was simply standing on the red carpet minding her own business, when Ariana's staff came bursting in demanding she move so Ariana could stand in that spot. Why? Because that meant Grande would be photographed from her good side. Rancic called it "Mariah-like" behavior and was not impressed.

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