Justin Bieber has added another tattoo to his growing collection. He got his mom, Patti Mallette’s eye on his forearm.

Perhaps he got the tattoo as a reminder to do the right thing, as he noted in a tweet “mom’s always watching.”

He posted a picture to Instagram, writing "@bangbangnyc did this art. Moms always watching ;)"

According to Celebuzz, the “As Long As You Love Me” singer got at least five tattoos this year alone. He has a brunette woman that looks eerily like girlfriend Selena Gomez, the logo for his hockey team from home in Canada, a koi, a knight, his mom’s birthday in roman numerals, the word Believe as in his best selling album, Jesus Christ symbols and more. In total, he has 16.

Last year, Bieber, 19, was scolded by late night talk show host David Letterman about the quantity of tattoos he has.

“Do me a favor -- don't go nuts, you know what I mean?" he said. "Because more and and more, you see the 'mural' and like the Sistine Chapel ... it's too much.”

image: Instagram