Justin Bieber and Selena Gomez are officially in love! That's according to a source who saw the young stars using the L word repeatedly during a shopping trip in New York City yesterday.

A source tells Hollywood Life the couple dropped by Armani Exchange yesterday evening and were affectionate during the visit. A fan captured a blurry photo and posted it online to confirm their appearance.

"Justin and Selena were holding hands as they shopped and said ‘I love you’ to each other not once, but several times in public. Everyone could hear them," the source tells the site. "I guess they want to share their love with the world."

The source continued, "Justin’s bodyguard wouldn’t let anyone get to close to them, but that didn’t stop them from showing off their affection for each other. They were just in their own world … Dazed and in love!"

It's no surprise that the teens would be in love since they've been dating so long, but using the L word publicly is a new development.

For the curious, Bieber and Gomez stopped by at 5:30PM and stayed for about 20 minutes. Justin bought six t-shirts, three in gray and three in white.

Watch Selena Gomez Present Justin Bieber with a MuchMusic Award