Katy Perry is celebrating her new 2013 "Prism" album, but the singer may have something else to smile about soon. John Mayer is reportedly proposing to the "Roar" performer, and the couple will head down the aisle after her divorce from Russell Brand.

According to US Weekly, Rihanna's reported friend, 29, and her rocker boyfriend, 36, are committed to each other and planning on tying the knot soon, insiders said.

"Everyone knows it's just a question of when John will propose," a source told US about Mayer, who took Perry as his date to his brother Carl's wedding at New York's Mamaroneck Beach & Yacht Club on Oct. 13. "[They] realize they must be together."

Sources revealed that the couple's future is looking brighter and brighter every day. Perry and Mayer, who have been together for 15 months, are very much in love.

And despite their three-month split earlier this year, they are inseparable.

"They Skype and text all day," another source told the celebrity news magazine. "John always checks in before bed!"

A proposal is definitely on the way, for it's just a question of when Mayer will pop the question, said a source close to the "Paper Doll" singer, according to Perez Hilton.

After a difficult break up with ex-husband, Brand, Perry is happy to be with Mayer.

"I actually am dating my crush," Perry told W for their November issue. "I had a crush on him for a long time and it so happens we fit together great."

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