Lars Nils "Lasse" Berghagen was a Swedish singer and songwriter. He represented Sweden in the Eurovision Song Contest 1975 with the song "Jennie, Jennie". He was also known for presenting Allsång på Skansen on Swedish television from 1994 up until 2003.

Allsång på Skansen is a Swedish show held at Skansen, Stockholm, every summer on Tuesdays between 8pm and 9pm. The audience is encouraged to sing along with musical guest stars to well-known Swedish and international songs. The show started in 1935 on a small scale; about 50 people in the audience. Today, about 10,000–25,500 people come to each performance.