Although country music star Taylor Swift, 18, says Jonas is just a friend, Jonas fuels dating rumors when he turns up at her concert. Of Swift, he says, "She's a great girl...I think anybody would love to go on a date with her." And Swift says of Joe, "He's an amazing guy and anybody would be lucky to be dating him." In October, the couple calls it quits, and Swift writes a track, "Forever and Always," inspired by their breakup.
Shortly after his breakup with Swift, Jonas begins dating 10,000 B.C. star Camilla Belle, who stars in his music video "Lovebug." The actress, who is three years older than Jonas, is described as "a really good girl" with "a lot of the same characteristics and morals" as the middle JoBro. They split in July 2009.
In addition to starring as a fictional band of singing brothers in their Disney sitcom JONAS, the trio – who receive a best new artist Grammy nomination – takes a more personal musical step with Lines, Vines and Trying Times. The album debuts atop the Billboard 200 chart, selling 247,000 copies in its first week.
After months of speculation linking Jonas to Demi Lovato, the Camp Rock costars finally come clean about their romance. Lovato gushes that Joe is her "perfect" guy, but by May he ends their relationship. "I realize over the time we have shared together that I feel I care more about our friendship right now," he tells PEOPLE of their breakup.
After being spotted in London and Los Angeles together over the summer, Jonas and Twilight star Ashley Greene take their relationship public. "[Joe] is head over heels for [Ashley]," a source tells PEOPLE. "He hasn't been this into a girl in a long time." In March, the pair announces the end of their romance.
With plans to launch a solo career, a newly single Jonas lands his first solo cover with Details magazine's April issue. "I'm growing up, the fans are growing up," Jonas, 21, says. "I've gone through a lot of stuff in my life so far. There are stories I haven't really been able to tell. When you're writing with three people, you wind up with a sound that might be – not average – but, you know, expected."
BIOGRAPHY (top to bottom): Chris Polk/FilmMagic; David Aguilera/BuzzFoto/FilmMagic; Splash News Online; Splash News Online