Cannes is definitely in full swing with celebs and fashionistas like Penelope Cruz, Javier Bardem, Kate Beckinsale and Naomi Watts stepping out in style at the swanky film festival.

Juror Kate Beckinsale is definitely in the running for our choice for Cannes best-dressed, changing from black sequins at a screening of the film Biutiful into a stunning pale pink Grecian dress for a party later that night.

Pene and Javier, who have only recently stepped out in public as a couple wore matching (boring) black, while Naomi Watts did the same, but forgot to wear a bra! We think we spot a runaway nipple...

Check out our MONSTER gallery of all the celebs partying like rock stars in Cannes last night!