The deal is done, and it's official: Nick Lachey will be guest-starring on One Tree Hill.

But what we don't know - or haven't until now - is exactly what the tabloid darling will be doing in small-town North Carolina, or with whom. Or even when.

Well, TV Guide says Lachey will be appearing in the April 27 episode, playing ... himself. Why? The former boy bander is hot to record a song written by Haley!

How's it all sound? The plot line, not the song? Is the prospect of hearing his cheesy music on the show worth the quality One Tree Hill quotes that will accompany it? Will this finally mean some meatier moments for Bethany Joy's Haley James Scott?

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.