Pop star Justin Bieber marked America's Mother's Day on Sunday (12May13) by bringing his mum onstage during his show in Johannesburg, South Africa.

The Baby hitmaker took to the stage at the city's FNB Stadium and thrilled fans when he asked his mother, Pattie Mallette, to join him for his rendition of hit track One Less Lonely Girl.

Bieber shared a picture on Twitter.com of the pair embracing onstage and added, "Happy Mother's Day pattie mallette. Today u r (you are) my Ollg. Love u. I love my momma. Great night tonight."

Mallette added, "So yep... justin bieber surprised me for mother's day tonight & brought me out for Ollg! very sweet."

Mother's Day is celebrated in North America annually on the second Sunday of May.