Justin Bieber grants the wish of a 6-year-old girl who is suffering from a rare cancer.
What was the little girl's wish? To marry Justin Bieber!
Justin surprised Avalanna by flying her and her family from Boston to New York for a special Valentine's Day visit.
Justin and Avalanna spent the day together playing board games, eating cupcakes, and finally getting married!
Justin tweeted: "That was one of the best things I have ever done. She was AWESOME! feeling really inspired now!" and later added "#MrsBieber really inspired me"
He then posted a picture of himself with Avalanna adding the caption "Best part of my day."