Photos: Katy Perry, Paris Hilton, Chris Evans at 1 OAK grand opening

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Denise Truscello/WireImage/DeniseTruscello.net

David Arquette, Rosetta Getty, Balthazar Getty, Patricia Arquette, Katy Perry, Jason Arasheben and Markus Molinari arrive at 1 OAK in the Mirage on Friday, Jan. 27,2012.

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Saturday, Jan. 28, 2012 | 3:39 p.m.

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The official Friday-night grand-opening party for 1 OAK at the Mirage was a star-studded affair, with Katy Perry, Markus Molinari, Paris and Nicky Hilton, David Arquette and girlfriend Christina McLarty, Patricia Arquette, Balthazar Getty and Rosetta Getty, Scott Disick minus baby mama Kourtney Kardashian, Chris Evans, Christina Milian, Shenae Grimes, Michelle Trachtenberg and more partying at the new hotspot.

Perry co-hosted the GiveLove charity event with J. Molinari Jewelry designers Markus Molinari and Jason Arasheben during the grand-opening weekend of 1 OAK, which continues tonight with Perry and more.

The Waking Up in Vegas singer, whose grandmother resides here, along with Arasheben and Molinari, presented a check to the charitys co-founders, Patricia Arquette and Rosetta Getty, and board m! ember Da vid Arquette (Patricia and David are siblings) before joining 1 OAK owners Richie Akiva and Scott Sartiano and Managing Partner Eli Pacino inside the nightclub.

As Perry kept a low profile enjoying cocktails and hanging out with friends at her VIP table, DJ Mia Moretti and violinist Caitlin Moe commandeered the DJ booth for a performance, and Jordanian-American pop singer Ferras followed the duo.

A number of the celebrities dined at nearby Stack before the party. GiveLove develops temporary housing solutions and improved sanitation systems in Haiti. Thanks to contributing videographer Richard Corey for his red carpet video posted on YouTube.

Don Chareunsy is editor of VegasDeLuxe.com and arts and entertainment editor of LasVegasSun.com.

Robin Leach has been a journalist for more than 50 years and has spent the past decade giving readers the inside scoop on Las Vegas, the worlds premier platinum playground.

Follow VDLX Editor Don Chareunsy on Twitter at Twitter.com/VDLXEditorDon.

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