Question: What is the name of the singer who performed in T in the Park 2013 and also produced a self-titled debut album which contained songs co-written with Iian Archer?
Sentence (from "T in the Park 2013"): T in the Park 2013 was a three-day music festival which took place between 11–14 July 2013 in Balado, Kinross.
Relevant evidence: Yes