Don't know whether anyone else has mentioned it here (can't read thru
all the comments - so many!), but the best rendition of the Peppino
song is VICO TORRIANI's "Pepino o Suricillo", which was a big hit in Germany in 1963. Its available in Italian on Vico's CD "Biedermann und Cool Man" (Bear Family Records 1996; Allen-Merrill-Chiosso version - orig: "Pepppino" by Lou Monte), and in German on his "Die grossen Hits" (Teldec 1990; Allen-Merrill-Bradtke) - both from Amazon.de (in Germany - & more than worth the 14 euro shipping for both), though the Biedermann is also avail from the US Amazon.
Not only is Vico's voice the most beautiful, but his enunciation is amazing, and his presentation is the funniest and the sweetest - so like Vico himself.