PHOTOS: Hollywood’s 25 Biggest Celebrity Divas

Some of Nicki Minaj’s demands are buckets of spicy fried chicken, a gallon of lemonade and two dozen pink or white roses. She also loves candles, but only ones that smell like baked goods, according to her tour rider.

Katy Perry hates carnations so much that she doesn’t allow them in her dressing room. And if you are driving her around, don’t look at her or speak to her, or else!

Madonna is a germaphobe, so she makes sure her team ofsterilizers gets rid of any skin, hair or saliva left behind in her dressing room. She is such a diva that the government of Malawi recently slammed her for her outrageous requests while visiting the country that her two kids, David and Mercy, were adopted from.

Justin Timberlake doesn’t like to share elevators with random people! While celebrating the release of Friends with Benefits in 2011, the superstar reportedly had people kicked out of an elevator so he could ride it in peace. Other requests of the former Mouseketeer include mirrors on the ceiling over his bed in his hotel room!

Diddy, aka Puff Daddy, aka Sean Combs only rides in the best of vehicles and demands chauffer driven Rolls-Royces, Mercedes and Maseratis.

Christina Aguilera is apparently a health nut, and requires tons of organic grub and vitamins, according to her 2010 tour rider.

Steven Tyler definitely proved he was a diva during American Idol, but he really revealed himself in his memoir. A few of his outrageousrequests during his early Aerosmith years included lots of drugs and a full-length mirror!

Salma Hayek may be beautiful, but she doesn’t want anyone staring at her! The luscious Latina reportedly will not tolerate anyone looking directly at her.

Justin Bieber was outraged and threw a fit at his birthday bash in London, when the club refused to let in his underage friends even though he was famous!

Jennifer Aniston reportedly displayed some diva behavior on the set of her new film, refusing to dine with the rest of the cast and crew or ride with them in production vans.