Celebrities were all about documenting their good times on Twitter this week! Rachel Zoe made it through the Oscars, as did her pal Nicole Richie. Justin Bieber proved you are what you eat, and Chace Crawford paid a visit to Kelly Ripa. Click through to see the photos we've gathered, and don't forget to follow us on Twitter for exciting news and photos!

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Ashton Kutcher and Demi Moore kicked off their Oscar weekend in LA last night at the Hollywood Domino and Artists for Peace and Justice charity event. Fresh off his trip to Russia, Ashton escorted Demi down the red carpet, and while the two won't be at Sunday's show, she and Madonna are once again hosting their 3rd annual Oscar party. AnnaLynne McCord was also in attendance but, unlike Demi, she didn't have a date to the party, although we did see her sharing a romantic dinner with Twilight's Kellan Lutz earlier this week. Rachel Zoe has a marathon weekend ahead of her as we continue to count down to the Oscars; she's styled many winners and presenters in the past - even a few of the most iconic gowns of all time.

To see more photos from the charity event, just read more.

Images include: Demi Moore, Nicky Hilton, Molly Sims, Ashton Kutcher, Rachel Zoe, Aaron Eckhart, Dave Annable, AnnaLynne McCord, Camilla Belle

Just like us, stars love to share their lives on Twitter. Whether they're on vacation, getting ready for a red carpet, or just hanging out with friends, the photos they post are an awesome peek into their lives. Click through to see the celebrity photos we've gathered over the past few weeks, and don't forget to follow us on Twitter for exciting news and photos!

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Since the LA premiere of Valentine’s Day had so much in the way of good and bad fashion, let’s take a look at the London premiere of the film. First of all, when I was looking at the photo grouping for the premiere, the above photo popped up first. Who are these girls? They’re a group somewhat famous in the UK called The Saturdays, and from the looks of it, I’d say they were like a more budget version of Pussycat Dolls? Does that sound right, English people? I have no idea, I’m just judging on them on their trashy fashion.

Now, on to the stars. Unfortunately, most of the “big” stars of Valentine’s Day didn’t make it London, so we don’t have to sit through another Jessica Biel overblown, over-dressed, over-done, trying too hard ball gown. Thank God. But we still get Demi Moore trying to pull focus away from her husband (who is actually in the film). Ashton looks like he’s freezing his balls off. And Demi looks like she no longer feels human temperatures. As for Demi’s dress… well, it’s not my taste, but she is working it well.

Jessica Alba has improved, sort of. I didn’t hate her look at the LA premiere, but I’m not in love with this one though. The boots ruin it for me. They’re insane.

Sigh… Emma Roberts. She’s a pretty little thing, and she looks a lot like her Aunt Julia. However, to me, she just doesn’t have that “spark” that most stars have. You know, that watchable quality, that special thing that many actors have where even if they’re not doing much, your eyes still follow them. Julia has it - but does her niece? Part of the problem might be that Emma looks like she borrowed something out of her grandma’s closet. Yes, she’s showing off her legs, but the top half of the dress is like “Nun-wear lite”.

I keep forgetting that Topher Grace is in this film. I’ve always really liked him, and I had high hopes that he would grow into a solid film actor. I’m kind of embarrassed for him that he’s in this film - I think he plays Anne Hathaway’s boyfriend or something. He’s so cute!

‘Valentine’s Day’ premiere in London, February 11, 2010. Credit: WENN.

Ashton Kutcher, Jessica Alba, and Emma Roberts headed to London to walk the red carpet at this evening's European premiere of Valentine's Day. Demi Moore was on Ashton's arm after joining him for photos at Monday's LA screening, where his costars Jennifer Garner, Jessica Biel, and Anne Hathaway celebrated the star-studded film. Jessica and Jennifer are currently in NYC promoting the movie with interviews individually and together, while Anne stayed behind in California to make the party rounds. Ashton had time to stop by The Jay Leno Show to joke about Jay's whole fiasco being a huge, late episode of Punk'D, just as we got a first look at his project with Katherine Heigl, now called Killers.

More photos from the London premiere, so read more.