Katy Perry and Justin Trudeau clearly have no problem with PDA ... because they were making out in the South of France in front of everyone on the beach ... including photogs.
Video shows the "Legendary Lovers" singer and the ex-prime minister of Canada swapping spit on Thursday ... during a romantic European getaway.
They locked lips at Les Palmiers beach club on Pampelonne Beach in Saint-Tropez ... pausing their sandy stroll to kiss and embrace in full view of cameras.
Justin Trudeau had his hands all over Katy Perry in the South of France ... in the name of sun safety, of course!
The former prime minister of Canada was applying KP's sunscreen, and he made sure to get all up in there ... going fully under her dress to protect the girls.
The move got some giggles out of the group -- Katy included -- as they went out on the water to soak up some sun.
Katy Perry and Justin Trudeau are going strong ... because she just shared a new photo of her planting a kiss on on his neck.
The "Dark Horse" singer just posted a photo dump on Instagram showing her recent holiday adventures, and among the 20 photos is an image of her kissing Justin on a yacht in a tropical location.
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Justin's smiling and looking at the camera as Katy leans in and kisses him.
