Biebs recently serenaded  his wifey (and no we’re not talking about Selena) at the Apollo Theater in NYC, singing "One Less Lonely Girl." Avalanna Routh, aka “Mrs. Bieber,” is a 6-year-old suffering from a rare form of cancer.
She is one of Justin Bieber’s biggest fans. The pop star made her Valentine's Day  wish come true when he flew her and her fam to Manhattan. The two spent the day eating cupcakes and playing board games. (We’re tots jealous. But seriously, no one deserves it more.) Oh yea. They also got hitched. (Hence, the "Mrs." Bieber.)
Could he get any sweeter? Cupcakes, "One Less Lonely Girl" serenade, and "marriage." Well he has! Check out his latest tweet. (Aww. Too cute to handle.)