Is Philly treasure Will Smith the nicest man to make it in showbiz or an egomaniacal monster?

Total egomaniac, says Janet Hubert, 53, who played Aunt Viv on the Fresh Prince's breakout show, The Fresh Prince of Bel-Air. Hubert lashes out at Smith in her memoir, Perfection Is Not a Sitcom Mom, which is slated for a 2010 release. In excerpts released to various blogs and media outlets, Hubert accuses Smith of sabotaging her work on the show. (She was fired in '93 and replaced with Daphne Maxwell Reid.)

"Smith had people around him who made sure no one outshone him," Hubert writes in an excerpt released to BlackVoices.com's Ent blog, BVbuzz.com. "I was happy to see Don Cheadle become the quality actor that he is, and often wondered how he made it past one episode."

So far, there's been no comment from Smith.

Joel: I'm moving on . . .

Alas, Billy Joel's latest Uptown Girl hasn't worked out. The 60-year-old Piano Man and his third wife, 27-year-old former Top Chef host Katie Lee, have split. (Figures: Their age difference wasn't nearly big enough.)

"After nearly five years of marriage, Billy and Katie have decided to separate," their reps said in a joint statement. "Billy and Katie remain caring friends [blah blah blah] . . ."

Joel's daughter Alexa Ray tells Extra! that he turned to her for aid: "Of course. I'm the first person he told. Absolutely, yeah." She's totally behind him: "I'm very protective of my father."

For her part, Alexa's mum, wife No. 2, Christie Brinkley, says, "I'm very sad that this has happened, and I wish them both happiness."

Prince William: Send me to war

Britain's Prince William, 26, yesterday said he wanted to go to war, especially now that his baby bro, Prince Harry, 24, already has served.

"In my eyes, if Harry can do it then I can do it," he said at a press confab where he and Harry discussed their military experience. "I didn't join the forces to be mollycoddled or treated any differently." William, who is second in line to the throne after his pops, Prince Charles, has been kept away from the war.

For his part, Harry, who finished a 10-week tour in Afghanistan in March '08, said he's raring to go back.

The brothers share a house near their base, RAF Shawbury, in Shropshire, England. They quipped that they regret the arrangement.

"It's been an emotional experience," said William. "Bearing in mind I cook, I feed him every day - I think [Harry has] done very well."

Levi about to storm the gates

High school dropout Levi Johnston, 24, is thisclose to major stardom. Bristol Palin's baby's pa has signed with a manager, Tank Jones, who says Levi is about to broker a major deal. So what exactly is the dude's talent? Singing? Acting? Magic? You might as well ask fellow renaissance man Leonardo Da Vinci to limit himself to one art.

"There's offers on the table for a little bit of everything - sitcom appearances, a reality show, some modeling," Jones tells People. "We haven't signed anything, but there's offers."

Jones is the perfect man to help launch a Hollywood career. As a private eye in Anchorage, Alaska, he's totally in the middle of the entertainment biz.

From the bottom of their hearts

Angelina Jolie and Brad Pitt would adopt every poor child in the world, if they could.

Instead, they continue to give like 0.009 percent of all they have. The U.N. High Commissioner for Refugees yesterday said the Jolie-Pitt Foundation has given $1 mil to help the more than two mil refugees who have been forced to abandon their homes by violence in Pakistan. The U.N. says the situation is "the most challenging humanitarian crisis of the past decade."

Miley's older sis in the spotlight

Speaking of older siblings who are beaten to the punch by the young'ns, Miley Cyrus' older sis, Brandi Cyrus, who has been hiding in the background as a guitarist for Miley's act, made her debut with her band, indie pop trio Frank and Derol, which opened for superstar dad Billy Ray Cyrus Sunday in Lalaland. Brandi's band features Codi Caraco as lead singer and Secret Life of the American Teenager star Megan Park on bass. It was an awesome experience, Park tells People. "Honestly, I just couldn't wait to get up and do it again!"

It's 'Impossible' for the 4th time

Impossible Missionary Tom Cruise, who has spread His Gospel of Cruiseiosity far and wide, is teaming up with the god of sci-fi geeks, J.J. Abrams, to produce a fourth installment of Mission: Impossible for a 2011 release. Variety says production will have to wait until J.J. finishes his Star Trek sequel, while Cruise is committed to an untitled flick costarring Cameron Diaz, not to mention the highly anticipated David Cronenberg adaptation of Robert Ludlum's The Matarese Circle, costarring Denzel Washington.

Be careful, Agent Jones . . .

Kudos to Jason Jones, the fake foreign correspondent for Jon Stewart's fake news show, The Daily Show, who secretly slipped into Iran sometime over the last month to tape a series of dispatches about the Islamic nation's elections dispassionately titled "Access of Evil."

They begin airing Monday.

Contact "SideShow" at sideshow@phillynews.com. This column contains information from Inquirer wire services.