YEREVAN, MAY 20, ARMENPRESS. A 10-year-old Argentinean girl had a special request for Paul McCartney during his May 17 concert at La Plata Stadium in Buenos Aires.

Leila, who was invited by McCartney onstage, asked if she could play bass with him instead of getting her teddy bear signed, reports Billboard.

"This could be interesting ... I didn't see this coming," said the McCartney as they handed the young fan a guitar. They then sang an impromptu duet of The Beatles' 1969 single "Get Back." 

After their rendition of the track, the 73-year-old musician thanked Leila and her mom, who was also invited onstage, in Spanish. Watch Leila and McCartney's performance below.