Although most people didn’t know that Joe Jonas and Camilla Belle had been dating until late last week, it turns out the two had already been spending quality time together. According to Us Weekly, this picture of the actress with the brothers was taken in Mexico back on November 9. This means Joe and Camilla were vacationing together just weeks after the breakup with Taylor Swift. (I guess life moves a lot more quickly when you’re a celebrity.)

Interestingly enough, it looks as if Jonas may have been seeking out Camilla months before they ever met. After the jump, you can see the 19-year-old reference Belle in a video made back in March.

With the news recently revealed that Joe Jonas is now dating actress Camilla Belle, the boy bander’s ex Taylor Swift says Camilla was the reason for their split.

“They’ve been together since we broke up,” Swift told Us Weekly. “That’s why we broke up — because he met her.”

And Taylor, whose song “Always and Forever” is about her breakup with Joe, says that guys should be aware that she may just write about them.

“You know what, if they don’t want me to write bad songs about them, they shouldn’t do bad things,” she says.

After a rocky end to his relationship with the country darling, which Swift talked and sang about, Joe Jonas 19, quietly began seeing 22-year-old Belle, who starred in the Jonas Brothers video “Lovebug.”

“They met on the set of his music video,” says the source. “All the guys always had thought she was really pretty and that’s why they asked her to be in it.”

So when did the atraction happen? “It was only after doing the video that they began to date.”

But don’t expect to see these two on red carpets together anytime soon. “They are not public about it but they’ve just been hanging out with their friends and Joe’s brothers,” explains the source. “They are very private about it.”

“She’s a really good girl and it seems they share a lot of the same characteristics and morals of Joe and his brothers” .

Reps for Jonas and Belle said: “no comment”.

Taylor Swift is opening up for the first time about her breakup with Joe Jonas – and she’s even singing about it on her new album.

“[It's] a song about watching somebody completely fade away in a relationship and wondering what you did wrong,” Swift, 18, tells PEOPLE about “Forever and Always,” the track inspired by her October split with Jonas, 19. The song appears on her new album Fearless, due Nov. 11.

Swift also tells PEOPLE that she’s not ready to date again and prefers being alone – for now.

“I would hate to jump into something so quickly and have it not be the right thing, because I don’t think I could take that right now,” she says.

During their summer romance, neither Swift nor Jonas would admit they were dating. But on Wednesday, Swift finally confirmed that they were a couple, and said Jonas is the only guy who’s ever hurt her “deeply.”

“It’s been tough,” she said of their breakup while chatting with Ryan Seacrest on his KIIS-FM radio show. “You just have to try to realize someday you’ll find someone that’s right for you.”

Swift is also using humor to deal with the split. She pokes fun at Jonas in a new vlog on her MySpace page that also features cameos from Selena Gomez and Patrick Dempsey.

At the 4:20 mark, Swift holds up a Joe Jonas doll and says, “See, this one even comes with a phone. So he can break up with other dolls.” A few scenes later, she holds up a Taylor Swift doll and says, “Stay away from him, ok?”

Jonas Brothers showed up this past Saturday for the 30th Anniversary of the Carousel of Hope Ball, which benefits the Barbara Davis Center for childhood diabetes.

Once inside, guests were treated to a special performance by the Jonas Brothers, with Nick Jonas singing “A Little Bit Longer.”

Nick wrote the song about his personal experiences since being diagnosed with Type 1 Diabetes three years ago.