The Canadian cutie had the word 'Believe' - the name of his latest album - inked on the inside of his left arm by celebrity skin artist Bang Bang during a visit to New York.
Selena Gomez's boy already has a number of designs including Jesus Christ's face on his left calf, a small dove on his hip and the word 'Yeshua', which means Jesus in Hebrew, written across his rib cage.
Justin, 18, isn't the only teen star to have recently revealed new body art - 1D boys Zayn Malik, 19, and Harry Styles, 20, were both snapped sporting new tatts in LA last week.
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Beth Shearing
