MUMBAI: Justin Bieber has dedicated his new tattoo to his friend's daughter, who is suffering from Lissencephaly, a rare brain disorder.

The ‘Beauty and the Beat’ hitmaker shared the image on photo-sharing website Instagram, which showed Bieber's arm, which is full of tattoos. However, among the tattoos, the letter 'G' appeared to be freshly inked on his arm, reports aceshowbiz.com.

He had the letter inked to honour his pastor friend Chad Veach's ailing daughter.

"This is for the strongest couple I know -- Chad and Julia Veach! Their daughter was born with Lissencephaly. She is incredible and has the sweetest soul. You guys make me better and I'm blessed to have you in my life #Georgia #gtat," the pop singer captioned the photograph.

This is for the strongest couple i know Chad and Julia Veach! Their daughter was born with Lissencephaly. She is incredible and has the sweetest soul. You guys make me better and I'm blessed to have you in my life #Georgia #gtat

A photo posted by Justin Bieber (@justinbieber) on Jul 9, 2015 at 5:12am PDT