Katy Perry celebrates Super Bowl performance by getting 'XLIX' tattoo

American popstar Katy Perry has decided to commemorate her Super Bowl half-time show performance by getting a tattoo on her finger.

The 30-year-old delivered a set of 'Roar', 'I Kissed A Girl', 'Teenage Dream' and 'Firework' at the University of Phoenix Stadium before the New England Patriots secured a dramatic 28-24 victory over Seattle Seahawks.

After the 49th installment of the NFL showpiece, Perry took to Instagram to reveal that she has had 'XLIX' tattooed on her finger.

Alongside an image, the singer, who was joined by Lenny Kravitz and Missy Elliott during her set, wrote: "I thought it would be appropriate to draw blood tonight... XLIX."

Ein von KATY PERRY (@katyperry) gepostetes Foto am 2. Feb 2015 um 12:06 Uhr

A photo posted by KATY PERRY (@katyperry) on Feb 2, 2015 at 12:09am PST