In the rarefied world of celebrity, where fawning minions fulfill nearly every want and whim, it can be tough to distinguish high-maintenance behavior from the standard star treatment. In recent days, several big names have supposedly made divalike demands, but are they being difficult or merely enjoying the perks of their position? You be the judge:

Jennifer Lopez isn't known for being easygoing when it comes to her environment, so it's not surprising she was very particular with her hotel needs during a promotional pit stop in London this week with hubby Marc Anthony. The Daily Mail details the two-page list of essentials expected in the pregnancy-denying but lately muumuu-favoring star's suite at the deluxe Dorchester Hotel, including such predictable indulgences as Jo Malone candles (in lime blossom and grapefruit), flowers (white or red roses or white lilies) and two humidifiers (one for each lung, apparently). But the rest of Lopez's requirements read like a shopping list for a Super Bowl party, with down-to-earth fare like potato chips, Coors Light (yeah, you read that right), fruit and veggie platters (with ranch dressing, natch), plain M&Ms, sunflower seeds, various colas, juices, energy drinks and bottled water, soft-baked chocolate chip cookies and Ritz crackers.

More nitpicky when it comes to noshing is Justin Timberlake, whom the New York Daily News says didn't impress "celebrity chef" Guy Rubino when he turned up at his Toronto eatery. "Timberlake comes into [the restaurant], doesn't even look at the menu and shouts for random food that we don't make," Rubino reportedly kvetched at the Bon Appetit magazine awards Monday night. "If he knew what he wanted, why come to an Asian restaurant in the first place?"

The chef also called out Nelly Furtado, who supposedly failed to alert him of a change to her 10-person reservation. "She showed up an hour late, with five extra people in tow," he recalled. "For parties that size, we do a prix-fixe type of menu. Nelly objected and was really rude about it. She expected individual dishes to be prepared." Rubino claims the singer's manager confronted him in the kitchen and told him, "Just [bleeping] do it!" He says he suggested that perhaps they should "just [bleeping] leave."

Meanwhile, the currently filming romcom "He's Just Not That Into You" may be overflowing with famous faces (Jennifer Aniston and Ben Affleck -- Bennifer the Third, if you will -- filmed a wedding scene on Thursday), but it's Scarlett Johansson who's being labeled the fussy one. Us Weekly says on her first day of filming, the pneumatic starlet was driven to the set, which was all of 100 yards away. Producer and co-star Drew Barrymore, on the other hand, hoofed it. Scarlett also allegedly requested three personal umbrella holders, perhaps to protect her peaches-and-cream complexion from the double dangers of UV rays and the paparazzi. "Scarlett's a total diva," a snitch tattles to the mag. "Some people are cool, and others are not." But a set insider denies she's been difficult, insisting, "We prefer talent use vans when filming on public streets, and Scarlett has only been professional."

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