<Tr> <Td> The Incredible String Band </Td> <Td> 6: 00 pm--6: 30 pm </Td> <Td> </Td> </Tr> <Tr> <Td> Canned Heat </Td> <Td> 7: 30 pm--8: 30 pm </Td> <Td> </Td> </Tr> <Tr> <Td> Mountain </Td> <Td> 9: 00 pm--10: 00 pm </Td> <Td> This performance was only their third gig as a band </Td> </Tr> <Tr> <Td> Grateful Dead </Td> <Td> 10: 30 pm--12: 05 am </Td> <Td> Their set was cut short after the stage amps overloaded during "Turn On Your Love Light". </Td> </Tr>

Who performed the most attended concert of all time