Jessica Alba  and Drew Barrymore  were joined by a host of other stylish celebrities last night when they celebrated the launch of Tommy Hilfiger 's new West Coast flagship store in West Hollywood. Drew and Jessica both wore Tommy Hilfiger outfits as they worked the red carpet with the designer and his wife, Dee. Jessica's latest public appearance was much less dramatic than the one she made on Jimmy Kimmel Live! on Tuesday when she took part in a celebrity kissing booth  and revealed her recent health scare.
Other famous attendees included Katy Perry , Olivia Munn, and Julianne Hough. Julianne was back in LA after a busy few days of press for Safe Haven in NYC, and dropped by the event sans boyfriend Ryan Seacrest , who attended the Topshop/Topman store opening nearby. Despite two fashionable bashes taking place in the same city, there were many stars who managed to attend each. Julianne, Jennifer Lopez , Estelle, and Jessica Lowndes all squeezed both events into their schedules.
Drew Barrymore , Jessica Alba , and Tommy Hilfiger  posed together on the red carpet.
Jennifer Lopez  dropped by the event.
Katy Perry  wore sunglasses to the party.
Julianne Hough met up with Tommy Hilfiger  inside.
Neil Patrick Harris  and David Burtka walked the carpet together.
Neil Patrick Harris  and David Burtka chatted with Katy Perry  inside the event.
Jessica Alba  and Cash Warren posed with Tommy Hilfiger  and wife Dee.
Ed Westwick  wore pink pants.
Adam Scott and Naomi Scott mingled at the party.
Olivia Munn wore shorts to the party.
Jessica Lowndes wore a blue skirt and white jacket.
Swizz Beatz wore a white jacket.
Dakota Johnson  looked chic in white.
Jessica Alba  posed with Kelly Patricof and Norah Weinstein.
Kristin Davis wore a pink Tommy Hilfiger  dress.
Gabriel Mann went for a simple suit.