Azealia Banks sang "Valerie" the past weekends, previously sung by Amy Winehouse in 2007 and (the original artist) The Zutons in 2006.
Has any other song been performed (sung live, at the least) by three or more different artists? Original artist not required.
Noel Gallagher's High Flying Birds played "Don't Look Back In Anger" this year and Oasis did in in 2002 but I don't know of any other performance of the song (and yeah, this is close enough to two different artists for these purposes) so that's only two.
Does "Valerie" win?