The couple, which has been dating since January, has been keeping a low profile while in the south of France, but the stars were photographed looking affectionate on a yacht last weekend, and dining with actress Kate Hudson and supermodel Kate Moss earlier this week.
Their Cannes outing comes after Bloom was accused of cheating on Perry with Selena Gomez, after photos emerged of the pair hugging while partying together in Las Vegas following the Come and Get It star's gig in Sin City on May 6.
Perry, 31, brushed off the drama on Twitter last week by posting a link to an article Bloom had written for Time magazine about his work as a United Nations Children's Emergency Fund (UNICEF) ambassador. With the link, she warned her fans against paying attention to the "dumb conspiracy" adding the hashtag, "#dontfeedthebeast".
Gomez, who has been friends with Bloom for years, echoed Perry's sentiments and showed solidarity by retweeting her message and adding a raised hands emoji. In a separate tweet, she referenced her song Kill Em With Kindness and wrote, "one day they'll get it lol (laugh out loud)."
Meanwhile, Perry and Bloom, 39, are expected to jet off to Mexico, where the singer is said to be among the guests invited to attend actress Eva Longoria's wedding.
The Latin lovely will exchange vows with TV mogul Jose "Pepe" Baston at the Acapulco home of Jane the Virgin star Jaime Camil on Saturday, according to People.com.
- WENN