X17 XCLUSIVE - PARIS HOOKS UP WITH CRISTIANO RONALDO!

Geez that was fast! Less than 24 hours after breaking up with Doug Reinhardt, Paris Hilton is already shacking up with a new man - soccer stud Cristiano Ronaldo!

The hot new couple started off their night separately, with Cristiano dining at the Brazilian restaurant Fogo De Chao while Paris and Nicky hit up Nobu, and an X17 source tells X17online exclusively about what began as a girls' night out:

"The Hilton sisters showed up at about 10:20pm and sat on the outside patio. Paris wasn't her usual chipper, chatty self - she looked absolutely miserable. She was clearly flying under the radar with her sister last night. She had a couple of cocktails and she was fiddling with her phone throughout the entire meal."

The ladies left around 11:20 and then headed to club MyHouse, and this is when Paris' night got immeasurably better. The ladies got to the club and plunked themselves down at a table with the Manchester United Real Madrid star, and sources inside the club tell X17online exclusively that the two couldn't keep their hands off of each other!

"Cristiano and Paris were all over each other swapping spit the entire night! His table needed every waitress in the building to service the large quantities of alcohol, and he spent an excess of 20 thousand dollars on champagne and drinks."

Dayum! So what happened after the club? Well, around 3am Cristiano cabbed it over to Nicky's house to hook up hang out with the heiress, and we shot this exclusive video of him leaving Nicky's West Hollywood pad at 5am!!!

The funniest thing about this is that Paris has had her eye on on Cristiano for over a year now! Even though her rep denied it last year, various media outlets reported that Paris attempted to work her charms on Cristiano at Villa last July, but Cristiano wasn't too keen on the starlet. So what changed?