Justin Bieber has made one fan the luckiest girl in the world by inviting her to be his date at the 2012 Billboard Awards!

High school student Cady Eimer had been campaigning for Justin to be her prom date for just over a year, even creating the website onelesslonelyprom.com.

Unfortunately Justin couldn't make it to her prom — but he did have a little surprise waiting for her at the end of the night.

In a recorded video message, Justin invited Cady and her sister to attend the Billboard Awards as his dates!

We. Are. So. Jelly.

Click through to watch Justin’s invitation video! Isn’t he just the sweetest?