Katy Perry reunites with John Mayer, gets Super Bowl tattoo

Here's one way Katy Perry is making sure to never forget her elaborate, pretty much universally well-received Super Bowl halftime show on Sunday.

The 30-year-old "Teenage Dream" singer just got a "XLIX" tattoo in honor of her show-stopping performance.

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"I thought it would be appropriate to draw blood tonight... XLIX" she posted on Instagram on Sunday, alongside this shot of her getting a tattoo on her finger.

But is Katy also celebrating a reunion with ex-boyfriend John Mayer? Missy Elliott -- who Katy brought on as a special guest during the halftime show -- tweeted this photo of her posing with the on-again/off-again couple at a Super Bowl afterparty.

"After party Super Bowl with @johnmayor @katyperry," the rapper wrote.

Katy and John reportedly split in February 2014, though the two appear anything but done -- Mayer, 37, was the one reportedly waiting behind-the-scenes to congratulate Katy when she came off stage following her performance, Us Weekly reports.

However, the singer/songwriter isn't Katy's only ex to show her some love on her big night. Her ex-husband Russell Brand also took to Twitter in a surprising show of support.

"Super Bowl may be baffling to Brits but half time show will be amazing. Good luck KP," his sweet message read.

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Check out the video below to hear Katy dish on her Super Bowl halftime show to ET!