Back of Lauren, Jon, and Fergie Get Hot in Hollywood It was a star-studded red carpet at Us Weekly's Hot Hollywood party in LA last night. Lauren Conrad is a staple at the yearly bash and looked angelic in white after spicing it up in yellow to give out spoilers at PaleyFest. Her ex Doug Reinhardt was there, attached at the hip with Paris Hilton as usual, though we'd rather gaze at Jon Hamm with Jennifer Westfeldt by his side. Even Kara DioGuardi stopped by after American Idol's double elimination night. Never ones to miss an event, Khloe and Kourtney Kardashian, back from their bikini trip to Mexico, made it out for the festivities as the gorgeous crowd partied the night away. View 50 Photos › Photo 1 Photo 2 Photo 3 Photo 4 Photo 5 To see lots more photos including Kelly Osbourne, Jon Hamm and many others just . View 50 Photos › Photo 1 Photo 2 Photo 3 Photo 4 Photo 5 Photo 6 Photo 7 Photo 8 Photo 9 Photo 10 Photo 11 Photo 12 Photo 13 Photo 14 Photo 15 Photo 16 Photo 17 Photo 18 Photo 19 Photo 20 Photo 21 Photo 22 Photo 23 Photo 24 Photo 25 Photo 26 Photo 27 Photo 28 Photo 29 Photo 30 Photo 31 Photo 32 Photo 33 Photo 34 Photo 35 Photo 36 Photo 37 Photo 38 Photo 39 Photo 40 Photo 41 Photo 42 Photo 43 Photo 44 Photo 45 Photo 46 Photo 47 Photo 48 Photo 49 Photo 50 Images include: Annie Wersching, Brittny Gastineau, Cheryl Burke, Cris Judd, Doug Reinhardt, Eliza Dushku, Fergie, Jennifer Westfeldt, Jon Hamm, Jordana Brewster, Kara DioGuardi, Karina Smirnoff, Kelly Osbourne, Kourtney Kardashian, Lauren Conrad, Martina McBride, Paris Hilton, Rachael Leigh Cook, Shanna Moakler, Taraji P. Henson, Tila Tequila, Estelle, Garcelle Beauvais, Khloe Kardashian, Holly Madison Source Comments junkies_la 8 years Lauren always wears the most unflattering clothes. Can't she see that her dress does nothing for her figure. ilanac13 8 years can't say that i LOVE lauren's look here, but it's nice for her to be out right? sabrina27 8 years LC looks awesome La-Tua-Cantante 8 years Lauren's been looking really pretty lately miss-malone 8 years I looove Fergie's skirt! She looks great. spicyaroma 8 years Fergie looks cute :) fleurfairy 8 years What's with Fergie's hair part? Is she going bald or something? It's alot wider than a normal person's.