Robert Pattinson and Kristen Stewart is so last season that people just can't stop talking about Rob and his current conquest, singer Katy Perry. The two have been making a lot of noise since the "Twilight" actor claimed he was "homeless" after his parents refused to move out of the LA home he lent them while he was filming in Canada.

"She's mad about Rob but is so terrified of getting serious and hurt again," a source told LOOK on Katy's budding romance with Stewart's ex. "I think that's why she's trying not to get too involved romantically. She'll also be super cautious of becoming one half of a celebrity couple yet again."

The 28-year-old actor have maintained a close friendship with the singer despite that they were dating other people. Rob was dating his "Twilight" co-star, while Perry dated the likes of Russell Brand and John Mayer. But since they are both single again, the two were spotted out frequently and most recently at the premiere party of Rob's upcoming film, "The Rover."

The source also revealed that the actor wants to bring things to the next level.

"Rob's behavior makes it clear to anyone who sees him with Katy that he's interested in taking their friendship further." The two are also in constant communication with each other despite their busy schedules and will use Skype, text or phone just to update each other.

Since her public breakup with fellow singer John Mayer, the "Roar" singer has been on a lot of flings, including Diplo, Rob Ackroyd and just recently, Rob Pattinson. According to OK, once of these three guys could end up impregnating her since she's been "looking for validation" since her breakup.

"Several people in her crew are worried she might slip up and get pregnant," a source told the publication posted on Gossip Cop. But the Web site believed that the publication is falsely accusing the singer for random pregnancy because of hooking up with her flings.

"The suggestion that she's hooking up with guys left and right and risking a random pregnancy is as wrong as when OK! falsely said she was having a baby with Mayer," according to the Web site. "Or when the mag said she was going to date Jared Leto... you get the point. OK! has no earthly idea what's going on in Perry's life, and the tab's track record proves it."

Singer Katy Perry L and her brother David Hudson arrive at the 56th annual Grammy Awards in Los Angeles, California January 26, 2014. REUTERSDanny Moloshok UNITED STATES TAGS ENTERTAINMENT GRAMMYS-ARRIVALS
Singer Katy Perry (L) and her brother David Hudson arrive at the 56th annual Grammy Awards in Los Angeles, California January 26, 2014. REUTERS/Danny Moloshok REUTERS/Danny Moloshok
Singer Katy Perry performs at the BRIT Awards, celebrating British pop music, at the O2 Arena in London February 19, 2014. REUTERSToby Melville
Singer Katy Perry performs at the BRIT Awards, celebrating British pop music, at the O2 Arena in London February 19, 2014. REUTERS/Toby Melville
Singer Katy Perry
Considered the number 3 most hot woman in the world, singer Katy Perry is also known as Katherine Elizabeth Hudson. Reuters
Neil Perry, Kimberly Perry and Reid Perry of The Band Perry arrive at the 2014 CMT Music Awards in Nashville
Neil Perry (L), Kimberly Perry and Reid Perry of The Band Perry arrive at the 2014 CMT Music Awards in Nashville, Tennessee June 4, 2014. REUTERS/Eric Henderson
Cast member Robert Pattinson poses during a photocall for the film quotThe Roverquot out of competition at the 67th Cannes Film Festival in Cannes May 18, 2014. REUTERSEric Gaillard
Cast member Robert Pattinson poses during a photocall for the film "The Rover" out of competition at the 67th Cannes Film Festival in Cannes May 18, 2014. REUTERS/Eric Gaillard
Cast member Robert Pattinson attends the premiere of quotThe Roverquot in Los Angeles, California June 12, 2014. The movie opens in the U.S. on June 20.
Cast member Robert Pattinson attends the premiere of "The Rover" in Los Angeles, California June 12, 2014. The movie opens in the U.S. on June 20. REUTERS/Mario Anzuoni REUTERS/Mario Anzuoni