Paris Hilton kept her 30th birthday celebrations going yesterday in NYC with three interview around the city. She first stopped by The Wendy Williams Show in a black and white mini to share a cake with the host, then changed into a flowing green maxi to head over to The Late Show. She actually sat down with David Letterman wearing something gold, and chatted all about her new iPhone app and how she'd like children with her current boyfriend, Cy Waits. Cy was by her side to indulge in their favorite thing, some PDA, as they left for MTV's The Seven. She wrapped things up by having dinner at the Gansevoort Hotel and then throwing on a sequined black dress to party with her girlfriends at Lavo — the bash took a turn for the dramatic, however, when a crasher stole her cake! It was the second event held to honor her milestone after her bash in LA, which brought out her parents and even Lil Wayne. We marked her big day in a different way by looking back at her top bikini moments!