I really love the work done by LeeDM101. To back that up here are three great mashups by the artist in question, including his latest, with a little help from Boris B and Instamatic
LeeDM101 - You Don't Know The Reason
http://www.youtube.com/watch?v=jBvI-H9JXBg - Editors "You Don't Know Love" vs Eric Prydz "Niton (the Reason)" vs Oasis "Outta Time" vs Depeche Mode "Sister of Night" vs New Order "The Perfect Kiss"
LeeDM101 (Audio) Boris B (Video) - Go Lady GO
http://www.youtube.com/watch?v=2wAR32248WA - Moby "Go" vs Ladytron
LeeDM101 (Audio) Instamatic (Video) - Radioactive Tubular Girls
http://www.youtube.com/watch?v=3OjkiuCp0bU - Duran Duran "Girls On Film" vs Mike Oldfield "Tubular Bells" vs Kraftwerk "Radioactivity"