Robert Pattinson Dating 'Mystery' Brunette after Kristen Stewart Split? 'Twilight' Heartthrob 'Cuddles' with New Girlfriend at Hollywood Party [RUMORS]

Apparently, Robert Pattinson's already moved-on from his former "Twilight" girlfriend Kristen Stewart. According to several eyewitnesses, R-Patz was spotted at a huge Hollywood bash over the weekend, cuddling and flirting with a "mystery" brunette. Does 27-year-old Pattinson have a new girlfriend?

Actress Shoshana Bush ( a good pal of Pattinson's) celebrated her 25th birthday at a party hosted by producer Allan Loeb on Saturday night (Sept. 21). R-Patz showed up for the star-studded event around midnight... with a gorgeous (unidentified) brunette in-tow.

An alleged Radar Online insider claims that the two "love birds" were all over each other the entire night:

"Rob and the brunette turned up around midnight. They were cute together. At one point, he was talking to someone and she wandered over and grabbed his hand and pulled him to over to near the pool. Their hands were all over each other!" The source continues, "She's really sweet and girl next door vibe. Rob is actually really nice and humble. They're a perfect match!" 

Since breaking things off with K-Stew earlier this summer, Pattinson's been spotted flirting with a slew of young women. He's really working that Hollywood Playboy status... so do fans really think this new "mystery" girl is R-Patz's secret main-squeeze?