Her sister Nicky might have attracted attention in her recent choice of bikini, but Paris Hilton is never one to be out of the limelight for long.
The 29-year-old - who is currently enjoying a festive break in Hawaii with her family - outdid her sister's tiny string bikini with an equally skimpy one of her own.
And she looked relaxed and healthy as she hit the beach in the tiny red, white and turquoise two-piece, which she teamed with matching oversized sunglasses.
Soaking up the rays: Paris Hilton displayed a brightly coloured two-piece as she hit the beach in Hawaii
Nicky Hilton also appeared toned and trim on Thursday as she played around in the surf in Maui, Hawaii.
The 27-year-old wore a black patterned two piece which looked even skimpier than the one worn by her sister.
Nicky and Paris are spending Christmas in Hawaii with their parents Kathy and Rick, Nicky's boyfriend David Katzenberg, and Paris' boyfriend Cy Waits.
Christmas treat: Paris is enjoying a family holiday with her parents David and Kathy, sister Nicky and their respective boyfriends
The sisters were spotted together in the sea on Thursday, while she and Cy also held hands in the surf.
Later on the pair were spotted getting cosy on a sun lounger together.
While Nicky has been looking slender and lithe on the beach, Paris, 29, looks as if she's put on a few pounds.
Hitting the waves: Paris and Nicki spent time together in the sea as they holidayed in Maui
The blonde socialite was spotted on the beach on Wednesday, not showing off nearly as much.
While Nicky was soaking up the rays in her barely-there two-piece, Paris wore a monokini and wraparound skirt in an attempt to cover up her fuller figure.
Earlier that day, Paris kept herself covered again as she and Waits went shopping, although he looked somewhat bored as she browsed a clothes rack.
Holding hands: Paris' boyfriend Cy Waits also joined her in the water at one point
The pair looked relaxed and in love as they strolled the beach and got into their Christmas break.
But their holiday didn't start so smoothly after they were involved in a drama at Los Angeles airport.
The sisters' plane was evacuated after a fellow traveller discovered a four-inch serrated knife hidden in a pocket on board.
Getting cosy: The couple looked relaxed as they sat together on a sun lounger on the beach
Paris tweeted: 'We were about to take off then security made everyone deplane because they found a big knife on board the plane.
'Scary that it got on plane.'
But the sisters are definitely enjoying themselves now, taking to their Twitter to rave about Hawaii.
Now it's Nicky's turn: Paris' sister woire another tiny two-piece on the beach, following the barely-there bikini she chose on Thursday
'Just took a nice dip in the ocean. So refreshing!' posted Nicki.
Bikini battle! While Paris wears covers up in a monokini, Nicki shows it all off
