Kristen Stewart and Robert Pattinson Split: R-Patz Moves Out with Dogs, K-Stew Heartbroken, Katy Perry Fuels Break Up with Hard-Partying Ways? [PHOTOS]

"Twilight" sweethearts Kristen Stewart and Robert Pattinson have officially broken up yet again - R-Patz only increased K-Stew's heartbreak when he moved his stuff out of their shared home on Sunday (May 19). Rumors have it that the split is totally tearing Stewart apart... meanwhile, Pattinson looked somber and unemotional as he drove off from K-Stew's Los Feliz home over the weekend, his two pet dogs riding shotgun. Several insiders insist that the separation's only "temporary" and that Robsten will get back together in no time. Still, other sources claim that Katy Perry was the one to fuel the break up, given that she was recently spotted partying with the "Cosmopolis" heartthrob (sans Stewart). So what do fans believe?

Following K-Stew's infidelity with "SWATH" director Rupert Sanders last summer, Robsten's rekindled relationship seemed to be going strong... up until R-Patz's 27th birthday. Read more on the recent break up here:

Kristen Stewart, Robert Pattinson SPLIT: 'Twilight' Lovers Break Up (Again) After Heated Fights, K-Stew 'Heartbroken,' Still Living Together 'Because of Dogs?'

The split's apparently legit this time... Pattinson even moved all of his stuff out:

An insider tells E! News that the root of the "temporary" seperation is "priorities" - the duo tried to work out their issues up until Saturday (May 18). But for now, breaking up was "the best for the time being."

Still, others think that pop songstress Katy Perry might have something to do with the "Twilight" split:

Kristen Stewart and Robert Pattinson UPDATE: Katy Perry Threatens 'Twilight' Relationship? John Mayer's Ex 'Would Date R-Patz' if Couple Split

Robert Pattinson and Kristen Stewart Update: R-Patz 'Cozies Up' with K-Stew's Bestie Katy Perry? Friends Approve of 'New' Romance

Kristen Stewart and Robert Pattinson Fight On R-Patz Birthday? 'Parties' with Katy Perry, 'Twilight' Sweetheart Jealous, Break Up Soon?

What do fans think about that - can you picture R-Patz dating Perry... after just breaking up with K-Stew?!