Charlie Puth gives a pop up performance for fan on her 17th birthday.

Pop star Charlie Puth is excited to surprise Alex, a young woman who’s active in giving back to her community. When she’s not busy volunteering at a youth organization or starting her own literacy program, Alex is an avid soccer player, who finds that Charlie’s music is the perfect inspiration to keep her going on the field and off. She’s about to turn 17, but has never had a birthday party, so it’s just the right excuse for Charlie to show up unannounced with a surprise performance of “How Long.”