Stephan Jenkins
Third Eye Blind performed "Jumper" for about 300 Occupy Wall Street holdouts in Zuccotti Park, a couple weeks after police raided the encampment and evicted protesters at the behest of NYC Mayor Michael Bloomberg.
Jackson Browne & Taylor Goldsmith
The left-leaning "Running on Empty" singer and the Dawes rocker performed in Zuccotti Park on Dec. 1, the first musical happening in the park since protesters were evicted from their encampment in mid-November.
Brad Pitt
The actor and philanthropist discussed the economy's ills and voiced support for the Occupy movement while promoting Moneyball in Japan.
Susan Sarandon
The Oscar winner, ping-pong enthusiast and increasingly outspoken political activist joined the OWS crowd.
Roseanne Barr
The former sitcom star gave a speech at Occupy Wall Street in which she shared her vision for a new capitalism that "rewards hard work and ambition, but cares for its weakest child."
Michael Moore & Tim Robbins
It would have been strange if the Capitalism: A Love Story director had not joined the Occupy Wall Street protesters. And it appears that a certain politically active Oscar winner would like a word.
Lupe Fiasco
"I love #occupy diversity! where else can u find a biochemist, a homeless brother, a physics teacher & a burlesque dancer talking revolution?" the rapper tweeted. The rapper, who's from the Windy City, has participated in Occupy Wall Street and Occupy Chicago. "Shout to the girls who used part of their lunch break yesterday to protest at @OccupyChicago...5 minutes of #solidarity goes a long way!" he wrote.
Mark Ruffalo
"Woke up this morning smiling about the new #OWS commercials. Thanks OWS for joining us in DC for #Tarsands Action!" the ecofriendly actor and avid OWS participant tweeted after members of the movement showed up to protest a planned oil pipeline from Canada to the Gulf of Mexico.
Mike Myers
"I'm a new American," the Canadian-born funnyman explained to a fellow marcher at Occupy Wall Street, "and I'm interested in a level playing field. I'm not an ideologue. I grew up working class...I think [OWS] is remarkably civil, remarkably articulate, it's democracy in action and it's fascinating to watch."
Alec Baldwin
The Emmy winner, who always seems to be mulling the idea of running for something, encouraged the OWS movement to "coalesce around some legislative policy" to further its cause.
Chris Martin
The Coldplay frontman told the Howard Stern Show that he didn't want to come off as a patronizing rich guy when he stopped by Occupy Wall Street while out for a run.
Sean Lennon
Questioning the man is in the musician's DNA. Sean and Rufus Wainwright put their spin on "Material Girl" for Occupy Wall Street. Yoko Ono has tweeted: "I love #OccupyWallStreet As John said, 'One hero cannot do it. Each one of us have to be heroes.' And you are. Thank you. love, yoko."
Rufus Wainwright
Loudon Wainwright III's son joined fellow classic-rock scion Sean Lennon in serenading Occupy Wall Street.
Russell Simmons, Russell Brand & Katy Perry
Katy and Russell were in Manhattan celebrating her 27th birthday when they stopped by Zuccotti Park and ran into the cofounder of Def Jam.
Russell Brand
Katy Perry's preternaturally curious hubby hit up Occupy Wall Street in the rain.
George Clooney
Like his pal Brad Pitt, the Oscar winner supports the cause, though he admittedly said he had "to learn more."
Jeff Ross
The comedian roasted Wall Street for the crowd at Occupy L.A. "The American dream is still alive," he said from the steps of City Hall. "Just head a little further to Canada to find it."
Pete Seeger
The 92-year-old folk legend joined marchers on the Upper West Side and, upon reaching Columbus Circle, led them in a rendition of "This Little Light of Mine" along with fellow artists Arlo Guthrie, Tom Chapin and David Amram.
Russell Simmons & Kanye West
The Def Jam cofounder has been spotted multiple times among the Occupy Wall Street throng, while the rap star's trip to the movement's camp in Washington Square Park was a big hit with the masses.
Tom Morello
The Rage Against the Machine guitarist, who also performs solo as the Nightwatchman, helped rally the crowd at Occupy London.
MC Hammer
The hip-hop star and aspiring search-engine starter tweeted from Occupy Oakland.
Penn Badgley
The Gossip Girl guy toted his own sign to OWS to show how much he doesn't XOXO the status quo.
Danny Glover
The Lethal Weapon star spoke at both Occupy Oakland and Occupy L.A. in one weekend. "Remember, you represent the 16.5 million people of those unemployed," he told protesters. "You represent the 88 percent of workers who are not represented by a union. You represent the homeless men and women. You represent those who've been dispossessed."