Kristen has 13 SUR concerts.

The group SUR started to take shape in the end of 2001, when its founder was writing music for the dance theatre performance Lust by Sebastjan Starič. At first this was a studio project with a couple of full members and several guest musicians. The material was recorded in the band's home studio and in May 2004 SUR released their first "physical" CD, 'Na jug' ('Southbound'). In 2005 the group started working on their second album, entitled 'Druga stran' ('Second Side'), which was released in July 2007.