Orlando Bloom practices dental hygiene but always leaves pieces of dental floss "everywhere", reveals Katy Perry, adding that this is one of her fiancé's worst habits.

During an appearance on "Heart Breakfast with Jamie Theakston and Amanda Holden" on Monday, the "California Gurls" singer, 37, revealed that while Bloom loves keeping his teeth clean, the strings never make it to the trash.

“He loves to floss, which thank God, ’cause some partners don’t and it is disgusting,” Perry said of Bloom, 45. She added, “He has brilliant teeth, but he leaves the floss everywhere.”

She then continued to list the places where Bloom's used floss always seems to end up. "On my side of the bed, and in the car, and on the kitchen table. I'm like, 'There [are] bins everywhere!'"

Orlando Bloom and Katy Perry
Orlando Bloom and Katy Perry pose upon their arrival at the Gala for the Global Ocean in Monaco on Sept. 26, 2018. Valery Hache/AFP/Getty Images

When host Theakston told the Grammy-winning artist that she "needs to train" the "Prince" voice actor better, Perry jokingly responded, "Yeah, well, I've done my best."

But, despite his one slight flaw, Perry has nothing but love for her fiancé, as she shared a touching message to him on Instagram, on his birthday.

“Happiest 45th to the kindest, deepest, most soulful, sexy & strong man I know,” she wrote. “Thank you for being a constant compass, an unwavering anchor and bringing joi de vivre into every room you walk in. You are the love and light of my life. I thank my lucky stars for you and our darling dd.”

Perry and Bloom dated on and off for a few years but announced their engagement via Instagram on Valentine's Day in 2019. The couple welcomed daughter Daisy Dove together in August 2020, per People.

Bloom was previously married to model Miranda Kerr from 2010 to 2013. The exes share an 11-year-old son, Flynn. Perry, meanwhile, was married to comedian Russell Brand from 2010 to 2012.