AceShowbiz -

Justin Bieber partnered with Make-A-Wish Foundation for a special concert on Wednesday night, May 27. The singer played a private show for a group of 20 young female fans at Lucky Strike bowling alley in Los Angeles.

For the occasion, Bieber was joined by guitarist Dan Kanter as he performed acoustic renditions of his biggest hits including "Hold Tight", "Baby", "Be Alright", "As Long as You Love Me" and "Boyfriend".

Continuing the tradition to serenade a female fan during the performance of "One Less Lonely Girl", Bieber picked one girl and sang the track for her a-capella.

Following the Wednesday event, the girls shared their excitement on social media. One fan wrote in a string of tweets, "He's so beautiful. I can't believe I met him. HES SO PERFECT SND SWEET AND SMELLS AMAZING OMG FFGF. Justin is the sweetest person. ever. Justin kept telling me I have a beautiful smile. Life is complete."

Another fan who goes by Ilia on Twitter shared pictures of her showing off a custom backpack covered with Bieber's mugshot. She said, "Justin did like my backpack. He even told me a story that goes with the bible because of it."

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— Ilia (@ilia331) May 27, 2015

8 years & it finally happened. I love you more than words can explain. @justinbieber pic.twitter.com/B0rQckDf3g

— Ilia (@ilia331) May 27, 2015

"My backpack shows that I will love him through all the bad times too. Don't take it the wrong way," she continued. "8 years & it finally happened. I love you more than words can explain. @justinbieber... I was like melting when he kept staring at me. He kept eye contact the whole time."

Bieber's manager Scooter Braun also shared a photo of the 21-year-old star performing and praised him in the caption, "Doing what matters. Good man @justinbieber #makeawish."

Doing what matters. Good man @justinbieber . #makeawish pic.twitter.com/Zutn0SL20G

— Scooter Braun (@scooterbraun) May 27, 2015