The couple's dress code was no muss no fuss for lunch: jeans, jumper, hat and shades, which in Katy's case translated to another A-list example of Invisible Man style. While lunch was a casual affair, the two dressed up for their evening celebrations - or at least Katy did. The singer glammed up in pretty floral dress, yellow wedges and bag but John simply added a shirt and bow tie to smarten up his look. We think that the birthday boy played it a little too cool with the jean jacket though. And John, you could have changed into your dancing shoes - these are the same scuffed pair from earlier!
We feel a poll coming on, take a look below and let us know what dating look you go for:
From cupcakes to latex, see just how much Katy's style has changed over the years: