Recently Dallas Green aka City and Colour, has been expressing his love for Adele and paid his tribute with a cover of 'Hometown Glory'. Quite a cover too! I wish I had been there to see it live, but for now YouTube will have to suffice.
Here are some other covers I like.
Band of horses covering Cee Lo Greens 'Georgia'
The Killers covering 'Girls Just Wanna Have Fun'
Death Cab For Cutie cover 'I Wanna be Adored'
Four Year Strong cover 'Shes So High'