Katy Perry and John Mayer were hand in hand for a sweet stroll around LA on Friday. The couple wore dueling baseball hats with him in an NY cap and her showing her LA pride. Katy and John have been sticking together lately, having also attended the Presidential Inauguration and escaping for a weekend away in Santa Barbara to kick off the New Year. Their relationship seems to be going strong with John commenting on Katy during a recent interview with Rolling Stone. He said, "I mean, I'm quite happy. I'm happy in all aspects of my life. I'm very happy in all aspects of my life." In addition to his girlfriend, John is also focused on his career with plans to tour this Summer after performing for the first time since throat surgery at a benefit for firefighters in Montana last month.