(UPI) -- You would think that celebrities in high-profile relationships with other celebrities would be cautious about bling on their left-hand ring finger.
Though the 29-year-old singer's rep doesn't make statements about her personal life, sources told US Weekly that the couple is not engaged.
"She's not engaged," the source said. "It was just a ring that went with the outfit."
A source told E! News, however, that Perry's engagement to her 36-year-old singer-songwriter beau is "inevitable."
"Everyone wants them to get engaged," the source said of Perry's family and friends, despite Mayer's womanizing reputation. "They are so perfect together."