Boards
Songs written by one unexpected band in the style of another band which that band wishes they were good enough to have written.
For example:
Arcade Fire wishes they were good enough to write 'Holy Ground' by Taylor Swift: http://www.youtube.com/watch?v=e8IYo-I-46c
Jimi Hendrix wishes he was good enough to have written 'Hey Dude' by Kula Shaker: http://www.youtube.com/watch?v=KDHd-vxcMDo
The Stone Roses wish they were good enough to have written 'Bon Chic Bon Genre' by Campag Velocet: http://www.youtube.com/watch?v=FtPRLqkz5dw