Drew Barrymore has been spotted canoodling with Justin Long three times in one week.

The Hollywood actress and her 'He's Just Not That Into You' co-star were first seen cuddling at a Los Angeles party on August 25, and were spotted kissing during dinner at Los Angeles' Pace restaurant just days later.

On Sunday, the stars got up close and personal once more as they partied at Las Vegas' Jet nightclub with Drew's close friend Cameron Diaz until 4am.

One source told Us Weekly magazine: "It was hot and heavy. Drew and Justin were all over each other."

Drew, 32, has been linked to a series of men since splitting from Strokes drummer Fabrizio Moretti in January, including 'Scrubs' star Zach Braff and 'Being John Malkovich' director Spike Jonze.

Earlier this month, it was reported Drew will be reuniting with Fabrizio to co-produce a new VH1 TV show called 'Clash of the Music Videos.'

'He's Just Not That Into You' - a comedy based on the 2004 best-selling book by Greg Behrendt and Liz Tuccillo - also stars Scarlett Johansson, Ben Affleck and Jennifer Aniston.

It is not scheduled to be released until 2009.

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