Sources close to both reveal exclusively to PerezHilton.com that singers Josh Groban and Katy Perry are dating!!!!!!!!!  Crazy!

"They've been trying to keep it very low profile," a source familiar with the relationship tells us.

Very sneaky!

On another note...make sure you are listening to me tomorrow cuz I have Katy Perry tickets along with meet and greet passes for her show tomorrow night at 1st Ave!  Good luck!

XOXO