Joe Jonas and Aussie singer Delta Goodrem had tongues wagging when they were seen holding hands recently, but it looks like the youngest JoBro is keeping this relationship all business ... at least that's the word from Delta's peeps.

A rep for Goodrem says, "He is one of the many people Delta is writing with. She's not making any comment about anything else." Um, ok .... so the rep ISN'T denying the two are involved either.

The gorgeous singer, who recently performed on Dancing With the Stars, is eight years older than Mr. Jonas. You go, boy!

See one of our favorite photos of Nick ... after the jump.