The `Beauty and a Beat` hitmaker surprised his mum Pattie Mallette by pulling her on stage during his concert in Johannesburg, South Africa, last night (12.05.13) for a special rendition of his song `One Less Lonely Girl` to mark the maternal occasion - which was celebrated by many countries on Sunday. Prior to the on-stage tribute, the 19-year-old star wrote on Twitter: "Happy Mother`s Day @pattiemallette. Today u r my #OLLG. Love u (sic)" Justin usually selects a lucky girl from the crowd to croon the love song to, but despite the throngs of screaming teenage girls in the audience, the singer instead chose to give Pattie, 38, a moment to cherish. The pop superstar presented his mother with a bouquet of roses and gave her a huge hug and kiss on the cheek as he sang the track, which includes lyrics such as "I`m coming for you, I`m gonna put you first/ I`m coming for you, I`ll show you what you`re worth". Afterwards, proud mum Pattie tweeted: "So yep @justinbieber surprised me for mother`s day tonight & brought me out for OLLG! #verysweet (sic)" Justin also documented the sweet moment by posting a snap and tweeting: "I love my momma . Great night tonight (sic)"