Paris Hilton Birthday Takes Over NYC

The birthday festivities for Paris Hilton will not be dying down anytime soon. Freshly celebrating the big 3-0 in a Moulin Rouge themed party at her mansion in L.A, Paris flew to New York for a string of live appearances and a massive birthday party last night at Lavo club star packed with the likes of designer Marc Bouwer, Aubrey O’ Day, and more.

Paris Hilton - It's a Ruff Life

Paris Out in LAWith her adorable Chihuahuas!

David Letterman Uses Paris Hilton's iPhone App to Make Her Boyfriend Jealous (VIDEO)

Paris Hilton was on 'Late Show' (Weeknights, 11:35PM ET on CBS) to hawk her new iPhone app, but David Letterman had a better idea. After she showed him the feature that allows you to superimpose a picture of Paris Hilton onto a picture you take of yourself, he decided it would be more fun to driver her boyfriend, Cy Waits, crazy.

"I wonder what the boyfriend thinks of this shot," Letterman said of the first picture Hilton took. It had her leaning provacatively toward him while he was sporting a huge grin.

To make it even better, the producers cut to a shot of Waits off-camera, and he did look uncomfortable about the whole thing. That just egged Letterman on.

He posed for another picture, and then upped the ante even further. "Mr. Big Shot back there in his Members Only jacket," he said smugly, "But look what I have for you." He then pulled out a huge bouquet and handed it to Paris, staring off-screen the whole time at Waits.

David Letterman Uses Paris Hilton's iPhone App to Make Her Boyfriend Jealous (VIDEO)

Paris Hilton was on 'Late Show' (Weeknights, 11:35PM ET on CBS) to hawk her new iPhone app, but David Letterman had a better idea. After she showed him the feature that allows you to superimpose a picture of Paris Hilton onto a picture you take of yourself, he decided it would be more fun to driver her boyfriend, Cy Waits, crazy.

"I wonder what the boyfriend thinks of this shot," Letterman said of the first picture Hilton took. It had her leaning provacatively toward him while he was sporting a huge grin.

To make it even better, the producers cut to a shot of Waits off-camera, and he did look uncomfortable about the whole thing. That just egged Letterman on.

He posed for another picture, and then upped the ante even further. "Mr. Big Shot back there in his Members Only jacket," he said smugly, "But look what I have for you." He then pulled out a huge bouquet and handed it to Paris, staring off-screen the whole time at Waits.

It’s Hard to be Paris Hilton

sometimes...really hard!