While serial dater John Mayer and serial candy dress wearer Katy Perry haven't even officially confirmed their romance after several months of dating, public outings and photo opps, details of Mayer's customized Christmas present for the pop diva have been unveiled.

In what can be deemed as an incredibly thoughtful and romantic gesture, Mayer put lots of effort into having a customized guitar made for Perry. Apparently, he wants to erase his former image as a blabbermouthing womanizer. Consult the Taylor Swift, Jennifer Aniston and Jessica Simpson reference guide and Mayer Dating Playbook for instances of his gaffes.

A source told The Sun (quotes via Female First), "John has put some serious effort into his Christmas gift for Katy. Since they met, he has been trying to prove he isn't the guy everyone says he is. This should definitely prove that -- every little detail on the guitar shows how much he thinks of her."

So what has he done to the instrument to prove his high regard for the 'Wide Awake' singer and to show he's not the cad we all thought he was? Well, it is supposedly covered in intricate designs, including her initials (KP or KH, since her real last name is Hudson?) and the date on which they met.

Can we get a collective "Aw?" One, two, three: "Awwww!"

The thoughtful gift is just the tip of the romantic iceberg for the duo. They are reportedly shopping for digs in Los Angeles, putting their feet on the relationship gas pedal. An insider shared, "John and Katy have decided to give it a proper go and want to find a place in L.A. to share."

They also are keenly aware that people are rooting against their relationship, given his dicey history. "But lots of people are willing them to fail," the source said. "They row a bit and have quite a turbulent up-and-down relationship, despite it only being a few months old. Many of her friends are certain it will all end in tears. But that's brought them closer in a way. It's given them an 'us against the world' mentality."

They are also together daily, according to the source, doing coupled up things like cooking, watching movies and playing music at his crib.

Sounds like love. Now they can make beautiful music together with Perry's customized guitar.

Watch the Katy Perry 'Wide Awake' Video

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