Right after New York Fashion Week, Paris Hilton has been very busy showing off her hot young 21 year- old Spanish beau River Viiperi.

Well, who wouldn’t? The Calvin Klein underwear model and Versace runway regular is just too sexy for words.

Paris now 31 years-old is 10 years older than River and takes him everywhere she goes.

Paris Hilton and River have been spending wonderful times together in Hawaii, Maui and Las Vegas.

‘Many thoughts, many smiles, many memories, many feelings, many dreams, just for one person,’ the blonde heiress gushed on twitter to her 8.9 million followers.

And River has been all mushy about Paris himself: ‘Good morning tweeps!! “Someday, someone will walk into your life and make you realize why it never worked out with anyone else” #lovinglife’

River isn’t the first model Paris Hilton has hooked up with. The heiress now turned DJ was once engaged to Tommy Hillfiger model Jason Shaw before they split in 2003. But compared to Jason, River Viiperi is more protective of Paris, as he was arrested by police last October 1 on a charge of misdemeanor battery for punching a dude who got too close to Paris at the XS Nightclub in Las Vegas.

Cheers to the happy couple!