Katy Perry and John Mayer “back together” after holding hands at Allison Williams’ wedding!

Katy Perry and John Mayer are apparently back together AGAIN for like the millionth time after they were spotted holding hands at *Girls *star Allison Williams' wedding on Saturday.

Katy and John have split up four times now (last time in July)...FOUR TIMES...surely that's a cause for official dismissal? But hey ho.

Now don't get too excited kids, because they *did *arrive on separate planes - However a source did tell People the couple are "definitely back together" following Allison and new hubby Ricky Van Veen's nuptials.

"John and Katy looked happy. They held hands and sat next to each other during the wedding ceremony," added the source.

And as John serenaded the newlyweds, it looks like Alison and Ricky got married on a ranch.

The publication revealed the big day was on Bush Creek Ranch in Saratoga, Wyoming.

The 27-year-old brunette and her 34-year-old hubby got married in front of close friends and family, including Allison‘s co-stars Lena Dunham, Jemima Kirke and Zosia Mamet in addition to Katy Perry, John Mayer and Seth Meyers.

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