Bryan Adams joins Bieber for acoustic performance of Baby

Singer Bryan Adams performed an unlikely duet when he joined pop star Justin Bieber for an acoustic performance of his star-making hit Baby.

The spontaneous mash-up, which took place at a Universal Music Group event Berlin, saw the Summer of 69 hitmaker on the guitar and Bieber, 21, handling the vocals, including Ludacris’ verse, reported Entertainment Weekly.

The Where Are You Now singer was there promoting his new album, which is slated for release on November 13.