Other times, the resurgence is a little more unexpected - like when Fleetwood Mac's "Dreams" or Fetty Wap's "Again" returned ...

Coldplay’s "Sparks" debuts at No. 40 on the Official Singles chart, becoming a top 40 hit in the U.K. thanks to viral success ...

A contestant with self-doubts got the whole ‘AGT’ theater cheering, with Simon Cowell dubbing it “fantastic audition.” ...