John Mayer refers to Katy Perry as his "wife".
The guitarist is rumoured to be close to proposing to his girlfriend - who he has been dating since June 2012 - and already referred to her as if they were married when backstage before a joint appearance on TV show Good Morning America earlier in the month.
"He kept calling Katy his wife. He said things like, 'I just do whatever the wife says' and then both of them would laugh. It was like looking at an old married couple," an insider told Life & Style.
Friends say Mayer has even been asking Perry's friends for tips on what type of ring would suit her.
"He's serious about proposing to Katy very soon," the source added
"He's been asking her friends what kind of ring she would like."
During their interview on Good Morning America, Katy talked about how they are constantly working on their relationship, and admitted they have their ups and downs.
"Relationships are kind of like riding a bull. You hang on for dear life. Sometimes you get a little buck here and there and sometimes you get things thrown at you but you get back on," the hitmaker explained.