John Mayer designs guitar for Katy Perry on Christmas

Musician John Mayer has designed a guitar for singer Katy Perry to gift her on Christmas. The couple have been dating for the past five months. The 35-year-old musician had the guitar covered in intricate designs, including Katy's initials and the date they first met.

"John has put some serious effort into his Christmas gift for Katy," the sun.co.uk quoted a source as saying.

"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," the source added.