American Idol

Adam has a beard. Who knew?

It's been in the works for a while -- and an hour ago, the deal was sealed.

Pia's performance signifies a borderline incestuous cross-pollination between the two biggest shows on TV ... "American Idol" and "Dancing."

And if that's not enough -- Pia will be back on "Idol" tomorrow for a special cast-off reunion.

As we previously reported, Pia and Mark went out on a date the NIGHT AFTER she got the boot from "Idol" ... and have since ratcheted up their romance.

There's a report out that Pia unceremoniously dumped her caterer boyfriend Carlos Nunez to trade up to Ballas.

But our "Dancing with the Stars"/"American Idol" spies tell us ... Carlos was history long before Mark entered the picture.

It all started back in February 2009 -- when cops cited Jacob for riding on an L.A. metro train without buying a ticket. Jacob blew off his court hearing and an arrest warrant was issued.

Fast forward to Nov. 2010 -- a day after Jacob auditioned for "Idol" and got his golden ticket to Hollywood -- Lusk was pulled over for a traffic stop. The cop discovered the warrant and arrested him.

Jacob went to jail and then to court the next day and pled no contest to the train-hopping charge. He was sentenced to 3 days in jail and 2 years probation.

Jacob served his time and then went back to court, telling the judge "Idol" wouldn't let him on the show if he was on probation. After his emotional plea, the merciful judge terminated his probation.

Fun Fact -- On night one in the pokey, Jacob sang to 170 inmates, who liked it a lot. Thing is, the guard wasn't a fan, screaming through the loud speaker, "This isn't a f**king singing contest."

Undaunted, we're told Lusk sang over the next day-and-a-half, preparing for "Idol." And on his last day, Lusk sang a farewell song, and another guard went on the loud speaker and said it was "bad ass!"

Sources connected with tonight's Minneapolis reunion show tell TMZ, Dr. Chris Kammer -- a giant toothbrush-carrying dentist who was cast off early in the season -- contacted the show organizer and fellow reject Caleb Hawley ... to see if they needed an MC.

Caleb wasn't into the idea -- and responded to Dr. Chris via email, writing, "Though I really appreciate your offer to MC, I think we'll hold this one down on our own."

Kauffman appeared on "Good Morning America" this AM, where she explained how the whole ordeal allegedly went down ... and also took the time to correct a few parts of her story that are circling around that AREN'T true.

Kaufman admitted she WASN'T forced to sit all the way in the back of the studio -- more like six rows back from the stage -- and that she DIDN'T have to sit alone without her friends.

Pia says she thinks we gave her good advice when she was in our office last week -- stand next to someone famous to fuel the rumor mill.

Pia and Mark hit it off so well during their date in L.A. on Friday, that Mark invited Pia back to the West Coast for another round of tonsil hockey ... and TO MEET HIS MOTHER.

Manfred Westphal, who heads up communications for Fremantle (which produces "Idol"), tells TMZ, 19-year-old Ashley Kauffman and her party of 6 were some of the first audience members to arrive for the April 7, 2011 show. Westphal says, "Our audience coordinator explained they had 6 great seats on the floor; however, the seats were in 2 groups of 3."

Westphal says Kauffman and her party agreed to be split up. And, Westphal says, contrary to Kauffman's allegation, she was not sent alone to the back of the studio. Westphal says Kauffman and 2 others in her party were seated 4 rows behind their friends, "directly in camera shot, in some of the best seats in the house."

We're told before Pia was booted, America's votes put her in the murky middle -- she was never near the top of the heap. As one "A.I." spy put it, "It was only a matter of time before Pia was kicked off. She was never going to win."

And, our spies say, there are 5 remaining contestants who are "fairly consistently placing in the top 4." Our sources would not reveal who they are, but we have an educated guess as to 3 of them -- Scotty McCreery, Lauren Alaina, and James Durbin. As for the remaining 2, we're guessing Jacob Lusk and Casey Abrams.

As for Pia, don't feel bad. We're told the rumored record deal she has with Interscope Records is more than a rumor. We're told it's a "certainty" Pia will sign. And something else -- Jimmy Iovine will ignore the judges, who wanted Pia to sing some up-tempo songs. Jimmy, we're told, will go strictly for ballads.

Our spies say Pia is flying in from New York later in the day and will have several dates with Mark during her stay. And they've already scheduled an evening where Mark's mother, Shirley, will break bread with the "American Idol" castoff.

TMZ broke the story ... Pia and Mark had a hot date last Friday and sucked some serious face. Pia was angling to meet Mark for awhile, and slipped Mark her phone number using "Dancing with the Stars" contestant Chris Jericho as a go-between.

Mark, we're told, is "totally into Pia and thinks she's amazing."

As one spy told TMZ, "They're totally smitten."

TMZ broke the story ... Mark and Pia went on a dinner date in L.A. ... and now we know what they had for dessert -- a big, fat mouthful of each other.

After her overdose/suicide attempt last year, it's good to see 'Tasia back on her feet again.

Our "Idol" spies tell us hundreds of fans have been begging FOX to recognize the injustice of kicking Pia off the show, and bend the rules. It appears these fans are organized, because they come with a singular message -- Stefano has no chance of winning and therefore he should be removed now as a sacrificial lamb so Pia can come back.

We're told the fans have even reached out to Stefano ... pleading with him to remove himself from the competition.