Tiffany Thornton and Sharon Osbourne step out to Gilt's launch party for the Wendy Bellissimo Collection; the 2012 L.A. Film Festival carries on with a SAG party; Sharon Stone and Priscilla Presley attend Million Dollar Quartet opening night; Paris Hilton and Bryan Greenberg hit the Sunset Strip premiere after party; Diplo spins the preview event for SBE's Blok in Hollywood—calm down, L.A., it's only Wednesday, so just breathe and let's discuss it all in this installment of Last Night's Parties.