Viggo Sommer Kristensen (born 28 January 1957) is a Danish musician and comedian.
He is primarily known for his work with the comedy trio De Nattergale, which made the popular TV-show The Julekalender in 1991.
Sommer also appeared in Bamse's Billedbog for children.
In late November 2015, the Danish punk band Skullclub published a Christmas album "Sving Dine Dadler" in which Sommer contributed the vocals.
Sommer was born in Viby at Aarhus, and still lives in Aarhus.