Here's how you can score tickets to see Drizzy on tour this summer.
Mumford brought Rogers to the Sommo Festival stage to join him on the Evermore song.
The show will be rescheduled for a future date.
"We knew there was great demand for tickets. We did not anticipate that the ticketing system would let us down," a statement from Farm Aid said.
Swift surprised her audience with the first-ever live performance of "Timeless" on Friday night (July 14).
Now that the Farewell Yellow Brick Road Tour has ended, a slew of competitors is racing up the road to $940 million.
Osbourne pulled out of the superstar lineup on Monday due to health reasons.
Stops include Madison Square Garden and a Halloween show at the Hollywood Bowl.
Conan Gray and Stray Kids also set for the Sept. event on the Great Lawn in New York's Central Park.
Dave Matthews and Tim Reynolds, Margo Price and Bob Weir will also be on Sept. 23 bill.
