Joe Jonas turned 20 years old on Saturday. But the singer isn’t in a celebratory mood today, as his lawyer has fired off a letter to Zack Taylor because that celebrity gossip blogger continues to insist that Jonas is slipping it to ex-girlfriend Demi Lovato.

Might Ashley Greene and Joe Jonas be an item after all? Last month, sources said the hunky singer was smitten with the actress, though they also confirmed that Greene didn’t reciprocate those feelings.

What’s a break-up between close friends? While Joe Jonas and Demi Lovato ended their romantic relationship in May, the pair still talk glowingly about each other in public and will soon go on tour with one another. Might this cause tension

It’s not enough for Joe Jonas to be handsome and talented. He also must be incredibly giving. As part of the Cambio Cares project, the singer recently spent time in Africa.

Ah, so this is why he showed up at the London premiere of Eclipse . While we’re always happy to see the cute mug of Joe Jonas, we were perplexed by his presence at last month’s event.

It’s about to get REALLY Hot in Cleveland . Joe Jonas has signed on to guest star on an August episode of this TV Land sitcom, which stars Betty White, Valerie Bertinelli, Jane Leeves and Wendie Malick. He’ll portray the son of Bertinelli’s character

The July 2010 issue of Teen Vogue is a collector’s item. How come?

It seems like only last week Demi Lovato was gushing about Joe Jonas and even thanking fans for her relationship with the singer. Oh, wait… it was! Now, just days later, “impeccable sources” allegedly tell Perez Hilton that Jonas has ended it with Lovato – in an astoundingly, hilariously immature way

Demi Lovato isn’t simply speaking publicly for the first time about boyfriend Joe Jonas.

Pity Joe Jonas … and any guy in a committed relationship.