Malibu was the place to be on Memorial Day this year -- as some of the biggest stars out there all hit up the same beach house bash!
Mega movie producer Joel Silver held his annual party yesterday in Malibu and it seems like every celeb in the area showed.
Gwen Stefani showed off her tight tummy in a white tank top at the fiesta, which she attended with husband Gavin Rossdale and their two boys Kingston and Zuma.
Another hot mom in attendance: Kate Beckinsale, who showed up with hubby Len Wiseman and daughter Lily.
Selena Gomez showed up without boyfriend Justin Bieber, wearing a t-shirt with a smile on it just one day after Justin's confrontation with a paparazzo.
Also there: Courteney Cox, David Arquette and their daughter Coco, who was sporting some crazy pink eyelashes ... plus Robert Downey Jr., Tobey Maguire, Ashley Greene, Dianna Agron, Josh Hartnett and Barbra Streisand.
Across the country in Miami, Gabrielle Union hit the beach as well -- showing off her bikini killer body.
It wasn't all fun and games for everyone by the beach though, as Taylor Swift was seen in Santa Monica heading into a recording studio. Looks like some people had to work!
Check out all the sightings above!
