Justin Bieber is a mama's boy, and he's not ashamed of it. On Mother's Day (Sunday, May 12), he marched his proud mom, Pattie Mallette, onstage in Johannesburg, South Africa, to show her how much he adores her.

Bieber appeared somewhat distracted during the first half of 'One Less Lonely Girl,' an ode to trying to a lady right -- and it turns out it was because he was keeping an eye out for Mallette. About midway through the song, some of Biebs' dancing escorted Mallette onto the stage, where the boy wonder gave her flowers, hugs and a heart-melting serenade for the remainder of the track.

Biebs, who recently appears to have split from longtime on-again, off-again girlfriend Selena Gomez yet again, tweeted about his moving night.

Who needs a girlfriend when you've got a great mom to dote upon? Looks like Ms. Mallette did a fine job raising her boy into a man!