Janet Jackson’s longterm boyfriend and producer, Jermaine Dupri, is said to have been so sauced at this 36th birthday party and he couldn’t even hold in the sick until he got to the bathroom. At his party at NY club Tenjune last Tuesday, he leaned right over and puked on Janet’s lap. Janet left right afterwards, and there’s no word how much longer Jermaine lasted that night. He was said to be downing champagne and tequila before he was no longer able to hold it in:

JERMAINE Dupri had a little too much of a good time celebrating his 36th birthday. The other night, Dupri and his squeeze, Janet Jackson, went to Tenjune, where, spies say, they shared bottles of Jay-Z’s Ace of Spades Champagne and Patrón tequila with Ne-Yo, Busta Rhymes and Ice-T – until Dupri “vomited in Janet’s lap. Ms. Jackson bolted out of the scene and sped off in her chauffeured Maybach.” A rep for Jackson and Dupri didn’t return calls. A rep for Tenjune declined to comment. Meanwhile, we hear Dupri is under some stress at work. The head of urban music for Island/Def Jam put out his lady’s last album, “Discipline,” which flopped. Our insider said, “[IDJ head] L.A. Reid had wanted to make changes to the album, make it fresher with some newer artists added in, but Janet said no – and Jermaine backed her up. He looks silly right now.”

[From The NY Post]

Have you ever been with a friend who got sick on someone like that? I once witnessed a woman upchuck directly on the bar, which seemed pretty remarkable to me at the time. How do you make it up to loved one when you puke all over them at an event? Do you bring flowers, a card saying ‘I’m so sorry I ruined your dress’?

If Dupri did do this, he’s got to be mortified now that the news is out. It also sounds mighty stupid for him to be insisting on creative control over Janet’s next album. He left Virgin records over the fact that Janet’s last album with Virgin, 20 Y.O., didn’t do that well on the charts. Janet’s Discipline, out earlier this year through Island, only peaked at 19. It sounds like Dupri is determined to have his way at Island and will drive this one into the ground too.

Here is Janet performing on the “Rock Witchu Tour 2008” in Chicago on 9/25/08. Credit: PRPhotos. Janet Jackson and Jermain Dupri are shown in the header at his birthday party on 9/23/08. Credit: WENN