Robert Plant and his band played "Immigrant Song" for the first time in 22 years at a festival in Iceland over the weekend. The capital city Reykjavik was the inspiration behind the Led Zeppelin classic, when the band's gig there in 1970 almost didnt' materialize because of a civil servants strike. But a local university stepped up and provided an alternate venue. Plant thanked the Icelandic audience for the song's inspiration and belted it out with the Sensational Space Shifters, though the high notes were a bit elusive for rock's lion. Fiona Apple is turning her biggest hit "Criminal" into an immigrant song of sorts. She is donating two years of profits from streaming and sales to a nonprofit helping detainees at the border navigate the minefield of legal issues facing them. And actor and pianist Jeff Goblum enlists Sharon Van Etton and an orchestra to preview songs from his forthcoming Decca jazz record, his second for the label, at last weekend's Glastonbury.