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

By Danica Bellini,Mstarz reporter | Apr 10, 2013 01:13 PM EDT

Kristen Stewart celebrated her 23rd birthday on Tuesday (April 9) in LA with her "Twilight" sweetheart Robert Pattinson and a slew of close friends. Although K-Stew and R-Patz's relationship appears to be going strong, Star magazine can't help but to stir up some more relationship drama! According to the tabloid's recent report, Stewart's gal pal Katy Perry recently admitted that she'd LOVE to date Pattinson if the duo were to ever break up again. Obviously, the "On the Road" starlet was not to pleased with her friend's enthusiasm in regards to her boyfriend... read on for more details.

The "Fireworks" songstress (who just split from Hollywood playboy John Mayer) allegedly confronted Stewart at a recent gathering at Pattinson's LA home. Perry told K-Stew that “she would be happy to take care of [Robert Pattinson] if they ever split.” That apparently got Stewart to thinking... has R-Patz already moved on from their rocky relationship?

According to several alleged inside sources, the "Twilight" lovebirds already have major trust issues, so Perry's comment really hit a nerve. One insider explains, "It makes Kristen think that maybe the rumors of them hooking up in the past are true."

Perry just broke up with Mayer in March, and Stewart and Pattinson have been there for her support. How could she do such a thing?!

However, readers shouldn't always be quick to believe what they read... Star magazine is known to sensationalize bogus drama surround K-Stew and R-Patz's relationship. The English heartthrob just returned from filming "The Rover" in Australia, and things seem to be going great between the reunited couple. The duo was spotted celebrating Stewart's birthday at LA's popular Malo Taqueria restaurant and No Vacancy bar (check out pics here). Rumors also have it they'll be hitting up the Coachella music festival together this weekend.

Gossip Cop reached out to a source close to the situation, who claims that the drama involving Katy Perry is "totally bogus."

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