-- Katy Perry celebrated her Superbowl XLIX halftime performance in a very permanent way -- by tattooing the roman numerals "XLIX" on her finger following her performance.
Early Monday morning, Perry posted a photo on her Instagram getting her new ink with the caption: "I thought it would be appropriate to draw blood tonight...XLIX"
Perry posted another photo of the finished tattoo on her finger.
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.