It sounds like Drew Barrymore is having a damn good time this summer. She’s been linked with three different guys, and there wasn’t one story of a painful breakup. A lot of people thought she might be in a long term relationship with director Spike Jonze as she was first seen out with him in March and they were spotted together again in August. They would have seemed like a couple, except Drew was seen holding hands and making out with Zach Braff in July.

And if two emo guys didn’t a good summer make, Drew was making out with Justin Long, the Mac guy who appears in the Mac vs. PC commercials, in Vegas last weekend. It seems like there’s more to it than just a quick hookup, because the pair were out together in LA earlier last week.

They are starring together in the new movie Drew is producing, He’s Just Not That Into You, so maybe what started out as business relationship turned into something more:

The He’s Just Not that Into You costars seemed really into one another over Labor Day in Vegas, where the two were “all over each other, making out the entire time,” a witness at Jet Nightclub tells PEOPLE.

First spotted together at Chateau Marmont on Aug. 28, Barrymore, 32, and Long, 29, brought their holiday weekend to a close back in Los Angeles at a trendy sushi restaurant with friends.

According to a Barrymore pal, “the relationship is very new.”

So new, in fact, the actress dallied with Scrubs star Zach Braff in June and rekindled old flame Spike Jonze in August.

[From People.com]

Last week there was a rumor that Drew was trying to hook up Jennifer Aniston with their other costar in the He’s Just Not That Into You movie, Bradley Cooper. Cooper was said to have invited Aniston over for a romantic dinner at his house on Drew’s suggestion, but not much more seems to have come of that. Cooper was also supposedly dating Cameron Diaz last week when they were seen out together too.

Scarlett Johansson, Jennifer Connelly, Ben Affleck, Ginnifer Goodwin, and Kevin Connolly are also in the He’s Just Not that Into You movie. Connelly and Affleck are married and ostensibly out of the running for co-star hookups, (not that it’s stopped other celebrities) but there are plenty of possibilities of hookups on this film set. According to IMDB it’s “in production” and I’m not sure if it’s even started filming yet. It usually seems like a bad idea to date people you’re working with because you’re stuck with them every day no matter what happens to the relationship. At least actors and actresses have the advantage of being on a limited time schedule so they know they’re only going to have to see the person for a few months and at some events afterwards.

A very wise older friend of mine once offered this advice about dating guys at work, “Don’t shit where you eat.” I know she didn’t come up with it or anything, but it usually comes to mind when I hear of situations like these.

I wonder who will end up avoiding each other at the premiere and if there will be any drama on set.

Here’s a video of Drew and Justin making out at dinner, thanks to Hollywood.tv via Best Week Ever:

Drew Barrymore is shown in the header on 5/1/07 at the Tribeca Film Festival. Thanks to PRPhotos.