Perry posted another photo of the finished tattoo on her finger.

??XLIX??

Une photo publiée par KATY PERRY (@katyperry) le 2 Févr. 2015 à 0h09 PST

Perry was the headline performer for the Super Bowl XLIX halftime show. She sang her hit songs \"Roar,\" \"I Kissed A Girl,\" \"Teenage Dream,\" and \"Firework.\" Missy Elliott and Lenny Kravitz also appeared.

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