Katy Perry reunites with John Mayer, gets Super Bowl tattoo

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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.

PHOTOS: Stars at the Super Bowl

"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.

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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.

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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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NEWS: Katy Perry's Exes React to Her Super Bowl Performance

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

Katy Perry To Perform 2015 Super Bowl Halftime Show!
Katy Perry To Perform 2015 Super Bowl Halftime Show!