Robert Pattinson and Katy Perry 'Crash' Wedding Rehearsal Following Kristen Stewart Split: R-Patz Parties with Songstress on Memorial Day Weekend, No PDA

"Twilight" lovebirds Robert Pattinson and Kristen Stewart parted romantic ways earlier this month... R-Patz made the split "official" when he packed up and moved his things out of K-Stew's home. The "Cosmopolis" heartthrob is currently dealing with the heartbreak by hanging out with good friend, Katy Perry! Reports confirm that the duo "crashed" a wedding rehearsal in Santa Barbara on Sunday (May 26)... in fact, they allegedly spent the entire Memorial Day weekend together. Sources confirm that the pair didn't exchange any sort of "PDA," but do Mstars readers think there might be more between Pattinson and the "Fireworks" songstress" than just friendship?

An insider for People reveals that Pattinson and Perry were spotted at a stranger's wedding rehersal in Santa Barbara on Sunday. The dressed-down duo hung out in back of a courtyard at the San Ysidro Ranch pre-ceremony. The source explains:

"Katy and Rob were just sitting next to each other watching the wedding rehearsal in the main courtyard area," a source told People. "There was no PDA between them and no body language that showed they were dating. They just sat together and watched.They were not affiliated with the wedding party and were not seen mingling with guests," rehearsal guest Stephanie Sands told the popular magazine.

(Check out photos from the venue here).

Fans also spotted the two pals together at a Santa Barbara hotel over the holiday weekend. On Memorial Day, Perry hosted a BBQ, and ex-beau John Mayer allegedly attended...

Perry and Pattinson are longtime friends... and the British heartthrob was there to help the "California Girls" starlet get over her break up from Hollywood playboy, John Mayer. Perhaps Perry's offering her support during this tough time for R-Patz and K-Stew? But according to several other gossip outlets, there's definitely been a flame burning between the two for quite some time:

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

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

An insider for Life & Style once said that Perry never approved of R-Patz's relationship with K-Stew - "Katy never really supported Rob's decision to get back with Kristen. She always said they wouldn't last. Katy told Rob she didn't think their relationship could withstand the cheating scandal. And he deserved better than someone who would destroy a family [like Rupert's]."

So what do fans think - would Pattinson and Perry make a cute couple, or are they better off just as good friends? Do readers foresee a Robsten reunion anytime soon?