Senator Hillary Rodham Clinton scored a decisive victory over Senator Barack Obama on Tuesday in the Pennsylvania primary, giving her candidacy a critical boost as she struggles to raise money and persuade party leaders to let the Democratic nominating fight go on.

If Mrs. Clinton did not emerge from the bruising six-week campaign with a race-turning landslide — she still trails Mr. Obama in the popular vote and the delegate count — her victory nonetheless gives her a strong rationale for continuing her candidacy in spite of those Democrats who would prefer to coalesce around Mr. Obama.

Indeed, in her victory speech in Philadelphia on Tuesday night, Mrs. Clinton used the words “fight,” “fighter” and “fighting” repeatedly — not only to promise financially struggling Americans that she would protect them, but also to convey that she had the resolve and confidence to stay in the race.

As for Mr. Obama, the loss only hardened the determination of his advisers to overwhelm Mrs. Clinton’s campaign with his substantial financial advantage — he took in $42 million in March to her $21 million — and with the cold calculus that he is still solidly ahead in their pursuit of the 2,025 delegates needed to win the Democratic nomination. In his concession speech, he kept the focus on the presumptive Republican nominee, Senator John McCain, a subject Mrs. Clinton avoided in her address.

Incomplete returns from Pennsylvania showed Mrs. Clinton leading 55 percent to 45 percent, with her victory propelled by her strong performance among women, older voters and less affluent and less educated voters; among white union members with no college education, she won almost three-quarters of the vote, polling showed.

Even as she celebrated, Mrs. Clinton nodded to the stiff challenges ahead for her campaign, not the least of them Mr. Obama’s financial advantage. In her speech, she implored her supporters to log onto her fund-raising Web site and “and show your support tonight because the future of this campaign is in your hands.” (Campaign officials said late Tuesday that they were having their best night ever in fund-raising online, bringing in $2.5 million in less than four hours.)

And she also defiantly acknowledged the Democrats and the pundits who have called on her to end her candidacy.

“Some people counted me out and said to drop out, but the American people don’t quit, and they deserve a president who doesn’t quit either,” Mrs. Clinton said to fervent cheers and applause at her victory party, where she was joined by former President Bill Clinton and their daughter, Chelsea, as well as two key supporters in the state, Gov. Edward G. Rendell and Mayor Michael Nutter of Philadelphia.

While Mrs. Clinton repeatedly sounded economically populist notes in her speech, Mr. Obama touched on those themes but was also more expansive in his remarks on Tuesday night, sharply criticizing Mr. McCain, as offering “more of the same” of President Bush’s policies. Mr. Obama left Pennsylvania late Tuesday to make his remarks in Indiana, which holds its primary on May 6, along with North Carolina.

Returning to his long-standing themes of unity and hope, Mr. Obama said: “We can continue to slice and dice this country into red states and blue states. We can exploit the divisions that exist in our country for pure political gain. Or this time, we can build on the movement we’ve started in this campaign.”

Yet Mr. Obama also faces challenges ahead: According to Republican Party officials, party members in North Carolina — which holds its primary on May 6 — are considering running an advertisement against Mr. Obama that highlights his ties to controversial figures like his former pastor, the Rev. Jeremiah A. Wright Jr. That ad could have the effect of adding a racially divisive element to that Southern state’s primary.

The Indiana primary, on the same day, poses another make-or-break moment for Mrs. Clinton, according to several of her advisers, who said they would urge her to quit the race if she lost that state. Mrs. Clinton, Mr. Clinton and their allies have campaigned frequently in Indiana in recent weeks, and she has some important endorsements, including support from Senator Evan Bayh, the state’s former governor.

“She has to win Pennsylvania and Indiana — pretty much everyone in the campaign agrees on that,” said one senior Clinton adviser, who spoke on the condition of anonymity to discuss the campaign’s electoral expectations.

The Pennsylvania race turned into a mammoth political battle in recent days, with both candidates pouring millions of dollars into television advertising — much of it negative — and criticizing each other relentlessly on the campaign trail. Mrs. Clinton questioned Mr. Obama’s electability and attacked him for saying that struggling Americans were “bitter,” while Mr. Obama tried to shave her lead in opinion polls.

Mrs. Clinton faces major challenges: her campaign is essentially out of money, with unpaid bills piling up, and she faces growing frustration among some Democratic officials who would prefer her to end her campaign in recognition of Mr. Obama’s lead in the overall popular vote of the primaries and caucuses so far, as well as his continuing edge toward amassing the 2,025 delegates needed to secure the nomination. And Tuesday’s night’s results likely did little to cut into his edge on that front.

Mrs. Clinton’s campaign spent Tuesday planning a fresh fundraising drive to trying to capitalize on her performance in Pennsylvania, while other aides mapped out political strategy and staff movement to Indiana and North Carolina.

Democratic Presidential candidate Barack Obama’s dominance among the Web savvy has been well documented (he won Mashable’s Super Tuesday poll by more than 3:1), but some new stats from Nielsen Online show that the trend extends to online video as well, where he attracted 518,000 unique viewers on his web site in March, versus 351,000 for Hillary Clinton, and just 38,000 for Republican John McCain.

As you can see in the chart, Obama’s supporters also spend more than 3x as long watching videos than supporters of the other candidates when they tune in:

We’ll find out tonight whether all of video viewing pays off in the form of votes, as Pennsylvania holds its Democratic Primary.

It looks Sony has decided to play catch up with the PlayStation 3, and offer a service that Xbox owners have been enjoying for a while now: online video distribution.

According to Dawn Chmielewski of the Los Angeles Times, Sony has been engaging in talks with Hollywood studios to negotiate online distribution of movies and television episodes. A spokesperson for Sony’s PlayStation unit, Patrick Seybold, declined to comment on the rumors except to confirm that the initiative does exist, and that there will be information released on Tuesday of this week.

Though the online video sales market pales in comparison to the DVD market ($95 million for online sales in 2007, $23.4 billion for DVD rentals and sales), it is expected to be a fast growing market with $6.4 billion in revenue by 2010. If Sony wants to make sure to get a piece of that pie, they’re going to have to act quickly, but they have a bad track record with this sort of distribution, and competition from just about every company you can think of.

Sony has already failed twice in this market with Movielink and Sony Connect, and now they will be taking on Amazon Unbox downloads to TiVos, the Xbox 360 marketplace, rumors of set top boxes from both Netflix and Blockbuster, Apple TV and assorted other means of getting video from your computer to your TV. Will the third time be the charm? Only time will tell. The PlayStation, while having a healthy performance sales wise has been locked in a battle for second place with the 360, and Nintendo’s Wii securing the top spot, the last hurdle will be if Sony even has enough units out there to make this sustainable.

It is almost humorous when you see someone grab a piece of fake fruit or pastry and attempt to take a bite. Some fake foods look and feel so real you can hardly tell them apart, until you try to sink your teeth in.

This poor kid just wants a nice afternoon snack, until he is completely fooled by this fake food display.

We just hope his mother was nice enough to give him a real snack afterwards.

American Idol mentor Mariah Carey says she can now fit into the same size jeans she wore when she was 16.

The diva told US chat show host Oprah Winfrey that she is “down to my tenth grade size” and can now fit into clothes she has not worn since high school, FemaleFirst reported.

Earlier this week, the Daily Mail revealed images of Mariah’s appearance on Oprah, where she shared her slimming secrets.

The Touch My Body singer revealed she flies personal trainer Patricia Gay from St Barts to her apartment in New York City, where they have developed a one-hour daily exercise routine.

“Working out and being on a diet has made me feel healthier, so that’s a good thing,” Mariah said, showing off a svelte figure in a red bikini.

Mariah’s music was the focus of the most recent week of competition on American Idol - with songs such as Hero and Vanishing performed by the contestants. According to MTV.com, the diva was an “awesome coach”.

The first of two episodes of American Idol - which has already aired in the US - is set to be shown this evening on ITV2.