The 'Firework' star and Mayer reportedly toured a variety of popular tourist locations in the California city such as the Old Mission, where they were seen publicly embracing.
© Rex Features
An eye-witness told X17 Online: "They were so in love. They were all over each other the whole time, and this was a total lovers' getaway."
Mayer was first linked to Perry in July when they were spotted sharing a meal together in Los Angeles.
The couple were rumoured to have broken up in October, but proved those claims false by sharing a romantic date on Mayer's 35th birthday a month ago.
It was reported recently that Mayer and Perry have upset their neighbourhoods with a series of loud love-making sessions.
Latest celebrity pictures:
Copyright: WENN Will Alexander/WENN.com
