Leif Arne Sundin (born 22 March 1971) is a Swedish rock vocalist and songwriter who has performed and recorded with Michael Schenker, John Norum and Brian Robertson among others.

Starting his career as vocalist with Swedish rock band Great King Rat, Sundin was described by Led Zeppelin guitarist Jimmy Page in Kerrang!

[3] Sundin subsequently joined forces with ex-Europe guitarist John Norum and has provided vocals for a number of his albums, also composing songs.

In 2011, Sundin provided vocals for ex-Thin Lizzy and Motörhead guitarist Brian Robertson's solo album Diamonds and Dirt.

Sundin has also formed his own band, House of Leaf, releasing an EP and an album in 2012.