London, July 20 :  Teen sensation Justin Bieber, who is dating singer Selena Gomez, thinks it is important to notice small changes in your girlfriend's appearance.

"I make sure to do the little things, like noticing when they get their hair done or when they change their nail colour," contactmusic.com quoted Bieber as saying.

"Also saying things all the time -- like, 'You're very pretty,' 'You're gorgeous,' things like that," he added.

© IANS