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President Barack Obama knows how to throw a good party and deliver a good red carpet and the White House Correspondents' Dinner, which took place over the weekend was no different. Along with the usual mix of politicians came fashion folk like Tory Burch and Rachel Zoe, models like Kate Upton and Irina Shayk and major actresses like Kerry Washington and Claire Danes. As you know, Kim Kardashian never misses a photo-op was made an appearance with mother Kris Jenner making Obama joke, 'Why is she famous anyway?' during his speech.

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Images courtesy of H&M

If there's one designer collaboration with the high street that we've been excited for, it's Marni for H&M. In the wake of the launch of the collection on March 8, the retailer and Marni designer Consuelo Catiglioni played host to a big party last night in Los Angeles to celebrate.

"It has been an inspiring night, surrounded by a perfect setting and a great crowd. L.A. encapsulated the dream," Catiglioni explained. "It is not long before Marni at H&M is in stores and I am happy to share these magical moments with everybody." Celebrating the experience with the team were stars like Drew Barrymoore, Jessica Chastain and Milla Jovoovich and collaborator, Sophia Coppola. "it"s nice to see again the people I worked with on the project for Marni and H&M," Coppola said at the event. "I just tried to do something that fitted with the mood of the collection, the fantasy and the fun of fashion."

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Despite still being labelled as an up-and-coming brand, Charlotte Ronson's success since launching her brand back in 2005 says quite the opposite. Aside from calling Gisele Bündchen and Nicole Richie fans, her collaborations with brands JCPenny and Urban Outfitters have brought in well over $30million. But it doesn't end there. This week she announced that she is expanding in beauty and will launch her first collection in Sephora stores as soon as September.

The beauty collection is already going downa treat with her celebrity pals. Rashida Jones, Lake Bell and Nicole Richie are only a few names amongst the list of stars that came out to Il Sole this week to try out the collection. Their support is definitely noted as Ronson has decided to name several pieces from the collection after her celebrity friends, which will undoubtedly boost sales. “A lot of my friends and family inspire me. You learn. If my friend has a great lipstick, you want to know what she’s wearing. Some people know how to wear makeup and some don’t. I am inspired by strong women who also give a lot to this world,” she told Fashionista. “I was very hands-on with everything. You have to be because it needs to have your essence in it beginning to end. I have no concept of time, but I feel like it’s been at least two years since the initial conversation about this, so it’s been a long time coming! My heart and soul is in this.”

Ashlee Simpson

Not to be overtaken by BlackBerry take over, this week T-Mobile hosted a launch event in Hollywood to reveal the new T-Mobile Sidekick LX at Paramount Studios.

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Ashton Kutcher and Demi Moore

It's not every event that can gather a range of A-listers as wide as the annual White House Correspondents' dinner, but trust Barack Obama to get a solid guest list. Last night's event drew everyone from Donatella Versace to Natalie Portman to Sting - and those in attendance got to hear the ba-da-bing side of the president.

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