Britney Spears: From Oscar Party Princess to Queen of Dirty Sweatpants

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What a difference a day makes!

Britney Spears was the belle of the ball at Elton John’s Oscar party on Sunday night, showing off her fabulous new hairstyle and hot body in a flattering floor-length black sequin gown. But on Monday afternoon, it was clear that the pop star’s Cinderella moment was over as she surfaced in Calabasas, California, dressed way down.

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In contrast to her show-stopping look the night before – when the chocolate-haired singer wore a Michael Cinco Haute Couture dress with a plunging neckline and was dripping in De Grisogono jewels – the 31-year-old looked unkempt. Her hair was in a messy ponytail, her T-shirt had holes in it, and her gray sweatpants had a stain on the back leg.

In fairness, Spears – who is gearing up for a long-term residency at a Caesars venue in Las Vegas – was said to be coming from dance class, so the ensemble makes sense. But when Forbes names you the Top-Earning Woman in Music for 2012 (she pulled in $58 million in a year’s time), perhaps it’s time to put the dirty sweatpants – that she’s worn many times over the last few weeks (we’ve been keeping track!) – into the Goodwill donation bin.

After all, you know how many activewear designers would be willing to send her free clothes? Most of them!

Spears’ new makeover was one of the most buzzed-about highlights of Oscars 2013 with Yahoo! Movies noting that the singer, who has had more than her fair share of ups and downs, was “looking better (and more natural) than ever.”

Her hair colorist, Brittany Hunter from the Mark Slicker Salon in Los Angeles, spoke out about the “hairspiration” behind the Spears’ look, which includes face-framing bangs in addition to the color change.

“Britney has wanted a change for about a month, but we waited a while until we decided to go with it,” Hunter told E! News. “Over the past month we both pulled out general pictures from magazines that we both like and then we collaborated on the color ... In the end we went with a very natural and rich light brown. We wanted the right tone that would complement her skin color.''

And Spears, who ended her engagement to Jason Trawick in December and is reportedly dating a regular Joe named David Lucado, loves her new look.

”She was very happy with the result,” Hunter added. “I do think she will stick with it.''

Two thumbs up her to sticking with the hair, but please – can we do something about those sweatpants?!

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