Pearl Jam had a special surprise for fans at their BST Hyde Park show in London last night (July 9). Seven songs into its set, the band brought out Johnny Marr to help play a cover of Neil Young's "Throw Your Hatred Down" from the 1995 Pearl Jam-assisted album Mirror Ball. The Smiths guitarist then came back out at the end of the set to assist on a cover of The Who's "Baba O'Riley." This isn't the first time Marr has played onstage with Eddie Vedder and company. In 2018, he joined the Pearl Jam frontman during his Ohana Festival to cover The Smiths' classic "There Is a Light That Never Goes Out." He also came out during a Pearl Jam show in Portland back in 2006 to help the band cover "All Along The Watchtower." Watch fan-shot footage of "Throw Your Hatred Down" and "Baba O'Riley" below. https://www.youtube.com/watch?vaLsUuWqbD5U&ab_channelGotsomePearlJam https://www.youtube.com/watch?vFUdMZUlo-8Q&ab_channelbrenotube Pearl Jam kicked off its postponed Gigaton tour in May, but unfortunately had to cancel the two final West Coast dates after bassist Jeff Ament tested positive for COVID. His diagnosis came after drummer Matt Cameron also contracted the virus. The band made do for a few nights by rotating in guest drummers, including their original drummer Dave Krusen. Pearl Jam's European tour wraps July 25 in Amsterdam, with a North American leg set to begin Sept. 1 in Quebec City, Quebec. In October, Vedder will host another edition of his Ohana Fest, which he will co-headline.