Pop star Katy Perry has unveiled a cover artwork for her song 'Birthday' from her album 'Prism'.
The 'Birthday' song was co-written by Bonnie McKee and was co-produced by Dr Luke and Max Martin in 2013, reported Ace Showbiz.
The 29-year-old 'Roar' hitmaker tweeted, "I present the cover of my next single," while uploading an old picture of her and her older sister Angela Hudson with a birthday cake in front of them.
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The singer is preparing to head over to the UK next month.
She will be seen performing during her 'Prismatic' world tour on the road.
