To see the Rolling Stones' 50th anniversary shows in London and New York, fans are shelling out at least $150 per ticket—but a lucky few hundred got to see a $20 "warm-up" gig in Paris yesterday. The band tweeted that tickets would be sold hours before the doors opened. "I can't believe we're all still standing up. You'd think by now one or two of us would be sitting down, but we're not," the 69-year-old Mick Jagger told the crowd at a 700-capacity Parisian venue, the Trabendo, Reuters reports. Said a fan: "It was a very small room and they were running all over the stage ... they seemed really happy."