October 31st is finally here, so it's time for tricks and treats! (And since this is Hollywood, you know we'll be seeing a lot of both.) Like last year, we're sure to spot many hot young celebs out and about tonight, but dressed as what? Take a look below at what some have already been wearing for costumes!
Happy Halloween, everyone - see you in November!

But not after a night of partying, after an AA meeting! (Yes, only in L.A. would an AA meeting be held in a club.) The 21-year-old starlet - looking sexy and stylish in black - exited the Key Club on Sunset around 1 p.m. today, and guess who was with her?Boyfriend Riley! Looks like he's giving her the kind of support she needs. We're loving good girl Lindsay!

Sophie kept her head down and her ear glued to her phone as she went for a jog (walk?) around Beverly Hills yesterday. In a city known for hosting high profile car accidents, she might want to keep her head up!

Russell took his eldest son Charles Halloween costume shopping in Los Angeles Tuesday night. But the Crowes left empty-handed when little Charles got scared! Awww, just don't look at this, Chuck, and you won't get scared!

To say that the news that American Gangster, the hotly-anticipated forthcoming release from Jay-Z, had hit the 'net without authorization must have come as a shock to the record-company execs - after all, according to Idolator, in an effort to curtail leaks, they'd only sent out fifteen copies! Imagine their surprise, then, when they traced the leaked mp3s back to the watermarks on the discs they'd mailed out to discover that, according to Idolator, no less than thirteen of the fifteen journalists had uploaded tracks to the web!

Yes, that's right - according to an interview the former boy-bander gave to E! News earlier today (as quoted by OK! Magazine), he tied the knot with a woman (whom Lance refuses to identify) back between 1999 and 2000 - purely for the free drinks! "The only reason we did it is because we wanted to get free drinks all night...and we didn't get one," the magazine quotes him as saying. "We're like, 'We just got married,' and they're like, 'Ah, whatever.'" Poor Lance - but then again, those are the risks you run when you don't set up a registry!

Paris and ex Stavros Niarchos were at Hyde! (The Hilton heiress later made a 7-11 stop.) Wonder if those two had much to talk about! What's with all these odd unions as of late? There's Paris and Stavros at Hyde, not to mention Lauren Conrad's lunch with Brody Jenner's ex Nicole Richie, who's Paris' former BFF. Talk about six degrees of celebrity separation!

Our European correspondents caught Amy Winehouse taking her leave after performing at L'Ancienne Belgique last night. Hey, with Amy's history of failing to appear at her own concerts (which has already led the producers of the next James Bond flick to drop her), we figured her fans might appreciate some cold hard proof that she's starting to change her ways!