Let's agree to disagree! Katy Perry holds hands with John Mayer as they support rival baseball teams on their sports caps

Katy Perry's such a California Girl that she's written a chart-topping song about it.
And while her relationship with New Yorker John Mayer may be going well, there is clearly one thing they will have to agree to disagree about.
As the couple went for a hike in Los Angeles on Friday they wore sports cap supporting their favourite baseball teams - the LA Dodgers and New York Yankees.

East coast, West coast: Katy Perry and John Mayer enjoy a hike in Los Angeles wearing their sports caps on Friday

Raised in Santa Barbara, Katy remains a steadfast Dodgers fan, while Connecticut-born John supports the team of his adopted home town.
But their divided loyalties obviously haven't come between the couple, who held hands as they worked up a sweat together.
Katy looked like a serious hiker in her practical lycra outfit of leggings and vest top, carrying a bottle of water.

All's well: Later that day John enjoyed a night out with Girls star Allison Williams in New York

And John was equally well prepared in his sleeveless vest and workout trousers.
Later on Friday John jetted to New York where he spent the evening with Girls star Allison Williams and some friends.
The two are long-term friends and both stayed at the same trendy hotel.
They left separately the next day.

Working out: The couple were suitably dressed for the strenuous hike

Katy is also a friend of Allison, tweeting a photo of them together at President Obama's inauguration last week.

Katy, 28, divorced from Russell Brand last year and has been dating 35-year-old Mayer for around six months.